Reference:6105

Bubbleback → '6105

Rolex Datejust 6105 with Datejust text on the dial

The 6105 is an early Datejust reference with the name printed on the dial. Auction catalogues place examples in the early 1950s and identify A.296 and 745-family movements. Antiquorum’s photograph of ref. 6075 case 685082 shows the same word, but the catalogue grades that dial restored. That image does not establish factory fitment, so the 6105 is often credited as the first dial-text reference rather than proven here as the only possible first.

Core facts

detail	value
reference	6105
family	Datejust / Big Bubbleback / Ovettone
production	about 1950–1953 (sources vary; 1953–1955 also documented)
case diameter	36mm (tonneau Oyster, Ovettone profile)
case construction	three-piece, screw-down caseback and crown
case materials	18K yellow gold (most common); 18K pink/rose gold (rare); documented two-tone yellow gold and steel
bezel	fine reeded/milled coin-edge gold (Datejust fluted precursor)
crystal	acrylic, domed
crown	screw-down brevet, "Rolex + Oyster" cross-center
movement	Cal. A.296 (listed as Cal. 745 in parts catalogs)
date complication	yes — date at 3 o'clock, gradual change around midnight
Cyclops	no (introduced on ref 6305 in 1954)
instantaneous date change	no (introduced with Cal. 1065 in refs 6604/6605, 1956–57)
"Datejust" text on dial	yes — present on documented 6105 examples; often credited as first, but an earlier 6075 dial photograph is catalogued as restored
notable configurations	left-handed "destro" crown-at-9 variant; Serpico y Laino co-signed; black gilt dial

What the 6105 is

The 6105 continues the 6074 and 6075 in the early Datejust line. It keeps the 36mm Ovettone case, the reeded coin-edge bezel, the domed screw-down back, the Jubilee option and the date window at 3 o'clock without a magnifier. Auction catalogues identify A.296 and 745-family movements in 6105 examples. Its documented dials carry Datejust text; the restored 6075 dial discussed below does not establish that the same wording was factory-fitted to that earlier case.

Collectors often credit the 6105 as the first reference with the model name printed on its dial. The auction examples cited here do not establish the earliest factory use.

Placing the 6105 in the Ovettone sequence

The 6105 sits among the Big Bubbleback references that preceded the later Datejust cases. The working sequence runs from the 1945 4467 through the 5028, 5030 and 5031, then the 6030/6031 pair and 6074/6075, with the 6105 in the early 1950s. Auction dates overlap and do not establish a precise factory changeover from one dial inscription to another. Later 6305 examples add the Cyclops; the 6604/6605 generation uses Cal. 1065 for instantaneous date change.

The 6105 sits on the edge of the Ovettone family. Some writers fold it in without hesitation, others treat it as a late continuation rather than a core member. Either way, it is clearly part of the same 36mm Big Bubbleback Datejust story.

The 36mm Big Bubbleback case

Case architecture on the 6105 is the Ovettone profile the 4467 established in 1945. Three-piece Oyster construction (bezel, mid-case, screw-down caseback) with a 36mm diameter tonneau form and the characteristic domed caseback that houses the rotor. The bezel is a thin reeded or milled coin-edge in matching gold, functionally identical to the 4467's and visually a direct precursor to the Datejust fluted bezel that crystallizes by the 1960s. The crystal is acrylic and domed, the crown a screw-down brevet marked "Rolex + Oyster" with cross-center. None of this is new.

The case shape is the one meaningful continuity from the 4467. A 36mm Ovettone reads differently on the wrist from a standard 32mm Bubbleback. It is still domed, still unmistakably an early automatic Rolex, but its proportions already point at the modern Datejust. The 6305 (1954) inherits this case profile almost unchanged, and the 1601 family of the 1960s refines it further. The 6105 is documented with Datejust text. Its position alongside the 6075 is less tidy than a simple unmarked-to-marked sequence suggests: a published 6075 dial photograph shows the word, but the auction house calls that dial restored.

One variant sits on top of this otherwise conventional architecture: the left-handed destro case. It is rare enough to matter, and it puts the 6105 into the short list of early left-crown Rolex references.

Precious metal and the configuration space

The 6105 is gold-dominant. 18K yellow gold is the most common configuration by a wide margin, and 18K pink or rose gold follows, with a smaller surviving population. Two-tone 18K yellow gold and steel examples are documented on 6105 cases and represent an early precursor to what becomes the Rolesor format on later Datejusts. A pure steel 6105 is less clearly documented than the yellow or pink gold variants; the Ovettone production bias toward precious metal is consistent with the 4467 era and only begins to loosen in the 6305 era.

The 6105 dial range is wider than the 4467's. Cream and silvered dials are the standard look, black gilt is the glamour variant, and honeycomb dials are rarer still. That spread is one reason the reference keeps more life than its auction numbers suggest.

Hands across the range are gold, alpha or dauphine on most examples, with luminous inserts on the sportier configurations and plain polished hands on dress variants. Date wheels are typically black-on-white; roulette wheels (red/black alternating) still appear on some earlier 6105 examples, carried over from the late-4467 era before settling into standard black numerals as the 1950s progressed.

A Serpico y Laino-signed 6105 matters for the same reason every strong Caracas-signed Rolex matters: the dial signature ties the watch into a documented retail network and adds a real premium if the signature is right.

Movement: Cal. A.296

The 6105 uses Cal. A.296, the next step up from the 4467's A.295 in the Aegler automatic family that powered the Ovettone references through the early 1950s. "A.296" denotes the movement's 29.6mm diameter. Rolex's parts-catalog nomenclature lists the same movement within the 740/745 family, consistent with how the 4467's A.295 appears as Cal. 740/745 in the same catalogs. The naming conventions run in parallel; the movement is one movement.

A.296 is the expected movement here: 18 jewels, unidirectional winding, no shock protection, and the same gradual date change the earlier Big Bubblebacks used. The fast takeaway is that the 6105 still belongs mechanically to the Bubbleback world, even as the Datejust name finally appears.

One detail matters for authentication on 6105 and 4467 examples alike: the dial feet differ between A.295 and A.296, so the two references do not share period-correct dials.

The dial text: what "Datejust" looks like on the 6105

Datejust is printed on the documented 6105 dials. It identifies the model on the face of the watch, but the available 6075 auction record prevents an unqualified claim that 6105 is the first reference ever to show the word. Antiquorum's photographed 6075 case 685082 carries the text; the catalogue grades that dial restored, so it remains unclear whether this was factory fitment or later work.

Collecting and auction context

The 6105 does not reach 4467 money, but the spread is still real. Yellow gold is the baseline, pink gold carries a premium, black gilt dials carry more, and Serpico or destro examples sit above that again. The rarest watches trade too infrequently to set a stable price.

The market position is steady rather than explosive. The 6105 matters more for what it is in the Datejust story than for any speculative market heat.

Auction coverage is thinner than for the 4467. The practical split is enough: ordinary yellow gold at the baseline, black gilt and signed-dial watches above it, and the rarest destro pieces beyond normal pricing ranges.

Authentication priorities

Authenticating a 6105 follows the same playbook as the rest of the Ovettone family, with one addition specific to this reference.

Movement should be A.296 (Cal. 745, or the 740/745 family in parts-catalog form); an A.295 in a 6105 case is a service-swap or a misidentified movement, as is a later caliber entirely. Movement architecture (unidirectional rotor, no shock protection, no quickset) should match period documentation.

Dial feet position is the defining 6105-versus-4467 authentication check. A.295 and A.296 dial feet sit in different positions, and a 6105 dial on a 4467 movement (or vice versa) is not period-correct. On reputable dealer and auction examples this is verified as standard; on private-market listings the buyer should confirm.

Dial text: "Datejust" above six is the reference-defining feature. Some dealers list Ovettone-era watches as 6105 when the dial lacks "Datejust" text, a catalog error rather than a rare variant. A 6105 without "Datejust" on the dial needs explanation.

Case material is 18K yellow, 18K pink, or documented two-tone. A steel-only 6105 needs scrutiny against period documentation; the Ovettone bias toward gold is consistent with the 4467 era and only genuinely breaks with the 6305 that follows.

Bracelet is Jubilee or Oyster in matching gold. Period-correct original-delivery bracelets are uncommon survivors; clasp-date verification against case serial is the standard check. Service-replacement Jubilees are common and are not disqualifying but do affect pricing.

Left-handed variants, the crown-at-nine destro configuration, are documented but rare. Provenance and photographic history matter more than usual given the reference's unusual layout.

What the 6105 established

The 6105 is an early Datejust reference with the model name printed on the dial. It is often cited as the first such reference. A photographed 6075 with the same wording complicates that account, but its dial was graded restored and does not prove original fitment. The earliest factory use of the dial text is not established by these auction records.

Related references

See also the movement reference, bracelet & clasp guide, and serial numbers by year.

Sources

• Antiquorum Geneva, 14 May 2006, lot 122, ref. 6075 case 685082 — photograph shows Datejust text; catalogue grades the dial restored.
• The Vintage Rolex Field Manual — Colin A. White, Morning Tundra
• Monochrome Watches — The Evergreens: Complete History of the Rolex Datejust — Monochrome
• Le Monde Edmond — Datejust: A Closer Look at a Rolex Icon — Le Monde Edmond
• Crown & Caliber — The History of the Rolex Datejust — Crown & Caliber
• Gear Patrol — Everything You Need to Know to Buy a Rolex Datejust — Gear Patrol
• BeckerTime — Rolex Decades: The 40s Datejust vs the 50s Datejust — BeckerTime
• Zealande — Everything You Need to Know About the Rolex Datejust — Zealande
• Goldammer — An Historical Tribune de Geneve Rolex Ref 4467 — Goldammer
• Robb Report — A Collector's Guide to Rolex Bubbleback Watches 1931-1950s — Robb Report
• Pandolfini Casa d'Aste catalog usage — 'Ovetto' for 32mm Bubblebacks, 'Ovettone' for 36mm Big Bubblebacks — Pandolfini Casa d'Aste, Pandolfini
• Aste Bolaffi catalog usage of 'Ovetto' for standard 32mm Bubblebacks — Aste Bolaffi