Reference:6556

A checked version of this page, approved on 9 October 2026, was based on this revision.

Steel Rolex Oyster Perpetual Tru-Beat 6556 with silvered crosshair dial and red seconds hand — Steel ref. 6556, Antiquorum Geneva, lot 215 (2020)

The Oyster Perpetual Tru-Beat 6556 uses a mechanical seconds hand that stops at each marker and jumps forward once per second. Rolex paired that dead-beat display with automatic Cal. 1040. Auction houses date the model’s introduction to 1954; surviving records show steel and 18K gold cases, while the exact production end and dial range remain unsettled.

Core facts

detail	value
reference	6556
model name	Oyster Perpetual Tru-Beat
family	Oyster Perpetual, time-only
launch	1954, as reported by Christie's and Phillips
observed examples	dated 1955–1962; these are lot dates, not a confirmed production span
movement	automatic Cal. 1040; the examined catalogues list 26 jewels
case	screw-back Oyster case; steel and 18K gold examples
diameter	34–35 mm in cited catalogues
crystal	acrylic, as catalogued on individual examples
display	hours, minutes, dead-beat centre seconds; no date

Where it sits in the line

The 6556 is a time-only Oyster Perpetual with a seconds complication. It does not share the 1030's ordinary sweep: Cal. 1040 adds the mechanism that advances the seconds hand once per second. Christie's describes the 1040 as a modified 1030, and watchmaker Aaron Berlow’s restoration account identifies a longer second intermediate wheel unique to the 1040. That difference matters when checking a watch whose seconds hand sweeps continuously after service.

Auction essays say the ticking seconds suited doctors counting a pulse. That use is plausible and appears repeatedly in specialist writing, but no Rolex advertisement or sales document is cited here to confirm the intended customer. Phillips documented one watch with a letter, medals and service papers linking it to watchmaker John Barnes and medical worker Daisy Cox; that is a provenance story for that specimen, not a customer census.

Production outline

Christie's and Phillips give 1954 as the launch year. The cited records include examples dated 1955 and 1956, plus steel and yellow-gold watches catalogued circa 1961 and 1962. Phillips and Christie's also repeat a 1959 end date. The later case-numbered examples make that cutoff uncertain; auction dates can be wrong, and the available evidence does not settle whether the reference remained in production or those pieces were dated loosely.

The available record supports a short run, but not a reliable production count. Auction language such as “few” and “rare” describes the market evidence, not a factory total.

Movement notes

Cal. 1040 is automatic and built around the 1030 architecture, with added dead-second works. The examined Christie’s, Phillips and Antiquorum lots identify 26 jewels. Treat that as a catalogue description of those watches, not a universal specification until a movement is inspected. The movement guide lists Cal. 1040 and records the reported, unproduced 1020 proposal.

The seconds mechanism needs a longer second intermediate wheel than the standard 1030. Watchmaker Aaron Berlow found that wheel intact in the 1040 he restored in 2015. He says the worn automatic train could use 1030 parts, and reports internet hearsay that Rolex sometimes replaced the dead-beat module with 1030 parts; he had not seen such a replacement himself. Hodinkee’s 2016 review says the function was often removed in service, though the watch pictured there still ticked. These are secondary reports, not a documented service count. A sweeping seconds hand calls for inspection but does not identify the work performed.

Cal. 1040 in Antiquorum’s 18K gold ref. 6556, lot 357 (2021).

Dial map

Silvered sector or crosshair dials with applied baton markers are well documented. Some photographed examples have a red seconds hand. The line divides the dial into four quadrants, but the available sources do not establish that every dial used it. A 1955 18K watch is catalogued with a gilt dial. The wording below six varies between “Superlative Chronometer Officially Certified” and “Superlative Chronometer by Official Test” in the photographed examples. No date sequence for the wording is established.

Christie’s described the 6556 as “Tru-Beat” or “Metropolitan” depending on the market; it said the model name was usually printed on the dial. A 2026 Monaco Legend catalogue calls a 1955 steel example “Metropolitan” and describes its silver sunburst dial, pink-gold markers and alpha hands. The catalogue claims this was a U.S.-exclusive variant, but gives no period Rolex source for that claim. The older Christie’s account presents Metropolitan as a market name, so the evidence does not establish a separate dial series or market restriction.

Steel ref. 6556 dial signed “Metropolitan,” Monaco Legend Auctions lot 37.

The dial text matters when assessing a watch, but one auction image cannot establish whether a particular dial or hand is original to its case. Hodinkee’s 2016 review specifically left the seconds hand on its example unresolved.

Case, bezel, crystal, and crown notes

The examined lots describe a screw-back, smooth-bezel Oyster case. The steel and gold examples in this source set measure 34 or 35 mm. Christie's describes a screw-down crown and plastic crystal on its 1955 gold watch; other catalogues do not consistently itemize the crystal or crown, so those details are not treated as a universal spec here.

Yellow-gold 6556s are documented by Christie’s, Phillips and Antiquorum. Antiquorum describes steel as the predominant case metal, with few pink- or yellow-gold examples; that is an auction-house observation, not a production count. The cited records include documented yellow-gold cases. No photographed pink-gold case is included here.

Yellow-gold ref. 6556, Antiquorum Hong Kong lot 357 (2021).
Inside caseback stamped 6556, same Antiquorum lot.

Bracelets, end links, clasps, and packaging notes

Riveted Oyster bracelets appear on steel and gold examples. Phillips lists a yellow-gold bracelet stamped 57; Antiquorum records an 18K yellow-gold ref. 7205 with a 57 end link. Sotheby’s and Christie's also document steel riveted bracelets. These are examples attached to individual watches. They do not prove that every 6556 left Rolex on a bracelet, or that a bracelet fitted today is original delivery.

Hodinkee’s 2016 photograph shows a visible gap where the author judged the end links incorrect for that watch. Check end-link fit on the individual watch; the 2016 example shows a visible gap. Boxes, guarantees and service papers accompany some auction examples, but packaging is period-based unless the papers tie it to the watch.

Special branches

The metal variants and dial wording are documented on sale examples, not a complete factory-option list. Phillips catalogues one black-dial watch as ref. 6558, while its inside caseback is stamped 6556; the listing identifies Cal. 1040 with 26 jewels. This single lot does not establish 6558 as a separate production reference or show whether the caseback was changed. The black dial is therefore recorded as a feature of that lot, not as a confirmed 6556 variant.

Antiquorum and Dr. Crott attribute to a 1960 Rolex catalogue a plan to replace the 6556 with ref. 1020, which they say was never produced. Their listings do not reproduce the catalogue page, so 1020 remains a reported plan rather than a documented production reference.

Historical market and auction record

date assigned	example	catalogue record
1955	18K gold, gilt dial, Cal. 1040, 34 mm	Christie’s, case 112846
1956	18K yellow gold, Cal. 1040, bracelet stamped 57, 35 mm	Phillips, case 139606; sold CHF 27,500
circa 1961	steel, silver sector dial, red seconds, 35 mm	Antiquorum, case 731422; sold CHF 9,375
circa 1961	steel example with medals, letter and service receipt	Phillips, case 138763; sold CHF 28,750
circa 1962	18K yellow gold, bracelet 7205/57, 35 mm	Antiquorum, case 739524; sold HKD 512,500

Case 731422 appears in both Antiquorum’s 2020 and Sotheby’s 2024 listings, so those catalogue entries describe one watch. Prices record individual sales and should not be read as a reference-wide value range.

Gallery

Steel 6556 with silvered crosshair dial and red seconds, Antiquorum Geneva lot 215 (2020).
Steel dial signed Metropolitan, Monaco Legend lot 37.
Yellow-gold example, Antiquorum Hong Kong lot 357.
Cal. 1040, Antiquorum Hong Kong lot 357.
Inside caseback stamped 6556, Antiquorum Hong Kong lot 357.