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Precision is Rolex's name for the tier below chronometer. A Precision watch left the factory with an adjusted movement and a waterproof Oyster case, without the Neuchâtel or Kew certificate, at a price that reflected the difference. The designation begins as dial text on two 1937 references, runs through the small manual-wind Oysters of the 1940s and 1950s, and survives as a grade label on the Air-King until 2006. PRECISION, EXTRA PRECISION, and SUPER PRECISION are all regulation grades, and none of the three is a chronometer rating. For a collector holding an unfamiliar dial, that is most of what the word does.
Rolex used Precision, Extra Precision, and Super Precision as movement-grade wording on many non-chronometer watches. The Vintage Rolex Field Manual treats these terms as accuracy classifications that followed the earlier Prima, Extra Prima, and Ultra Prima grades. They are not interchangeable with an officially certified chronometer. The surviving record places the wording on the first 3003 and 3004 Oyster Precision references in 1937, on later manual-wind Oysters, and on some Air-King dials. A dial inscription is evidence about the watch's intended grade, not proof that its present movement is original.


[[File:Ref3003 antiquorum lot163 2.jpg|thumb|center|500px|alt=Rolex 3003 Oyster Precision (1937) — one of the first two Rolex references to carry the 'Precision' designation|Rolex 3003 Oyster Precision (1937) — one of the first two Rolex references to carry the 'Precision' designation]]
<div class="rp-lead">[[File:Ref3003 antiquorum lot163 2.jpg|thumb|center|640px|alt=Rolex 3003 Oyster Precision from 1937|Rolex 3003 Oyster Precision from 1937.]]</div>


Rolex ran the Precision names alongside the Perpetual from the beginning. The automatic Oyster Perpetual arrived in 1933 on the Bubbleback platform, and the manual-wind Oyster Precision arrived four years later as the lower-priced parallel track. Manual-wind Precision production ended in the mid-1980s, by which point the Datejust and the automatic Oyster Perpetual had absorbed the non-sport catalog. The dial text outlived the manual movements: the Air-King carried Precision and Super Precision on automatic calibers from 1953 through the 14000M.
The manual-wind Oyster Precision and the automatic Oyster Perpetual were parallel parts of the prewar and postwar range. The wording continued on some manual-wind references after the Bubbleback era and later appeared on Air-King dials. The 14000 and 14000M period is not uniform: surviving dials may read Precision or omit the grade line, so the reference and movement must be checked together.


== Common entry points ==
== Common entry points ==
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Before Precision there was Prima. Aegler graded its movements Prima, Extra Prima, and Ultra Prima through the 1920s and early 1930s, each name a regulation standard applied to broadly the same architecture. By the mid-1930s the vocabulary had shifted to Precision, Extra Precision, and Super Precision, with the same logic underneath: better adjustment, more positions, tighter rates, all of it sitting below the chronometer certificate.
Before Precision there was Prima. Aegler graded its movements Prima, Extra Prima, and Ultra Prima through the 1920s and early 1930s, each name a regulation standard applied to broadly the same architecture. By the mid-1930s the vocabulary had shifted to Precision, Extra Precision, and Super Precision, with the same logic underneath: better adjustment, more positions, tighter rates, all of it sitting below the chronometer certificate.


In practice a Precision dial rules a chronometer rating out. A 1937 buyer choosing an Oyster Precision over an Oyster Perpetual Chronometer received the same Oyster case, the same screw-down crown, and the same warranty against dust and water, minus the certificate and the price that came with it.
A Precision dial does not document an official chronometer certificate. Case construction and warranty terms still need to be read from the individual watch and its period papers; the grade word alone does not establish that the case, movement, or paperwork are original.


The relationship between grade text and actual adjustment is looser than the vocabulary suggests. The Air-King 6552 runs a Cal. 1030 adjusted to chronometer standard and still reads Super Precision on the dial. Marcus Siems puts the distinction plainly: "in contrast to other Oyster Perpetuals these Air-Kings weren't Chronometer certified and marked Super Precision." The words describe what Rolex was willing to certify and sell, and the certification is what the buyer paid for.
The relationship between grade text and actual adjustment is looser than the vocabulary suggests. The Air-King 6552 runs a Cal. 1030 adjusted to chronometer standard and still reads Super Precision on the dial. Marcus Siems puts the distinction plainly: "in contrast to other Oyster Perpetuals these Air-Kings weren't Chronometer certified and marked Super Precision." The words describe what Rolex was willing to certify and sell, and the certification is what the buyer paid for.
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The line continues well past this table. The 6426 of the 1970s runs the same logic as the 3003 of 1937: manual-wind Oyster, adjusted movement, no chronometer certificate, OYSTER PRECISION on the dial.
The line continues into later manual-wind references such as the 6426. Its dial and movement should be documented from the individual watch rather than inferred from the 3003 example.


== Precision and Super Precision on the Air-King ==
== Precision and Super Precision on the Air-King ==


The Air-King is where the designation ran longest and where the two grades are easiest to date. The originating 1945 generation reads PRECISION because the Hunter caliber was never chronometer-rated and Precision was the highest text available to it. From 1953 the automatic Air-Kings read SUPER PRECISION. From the early 1960s the text reverts to PRECISION or disappears from the dial entirely. The switch tracks the caliber generation, and neither grade is a chronometer certificate at any point in the sequence.
The Air-King is where the designation ran longest and where the two grades are easiest to date. The Air-King sequence shows both wording and caliber changes. Early hand-wound examples carry PRECISION; early automatic examples commonly carry SUPER PRECISION; later examples may read PRECISION or omit the grade line. The pairing is a dating clue, not a complete authentication test, because service dials and movements can be mixed.


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== Related families ==
== Related families ==


* [[Reference:bubbleback|Oyster & Bubbleback]] — the parallel automatic track. The Bubbleback hub carries the full 1926–1953 Oyster chronology, including the manual-wind Precision references listed here.
* [[Reference:bubbleback|Oyster & Bubbleback]]: the parallel automatic track and shared early Oyster chronology.
* [[Reference:air-king|Air-King]] — the line that carried the Precision designation longest, from the 1945 originating generation through the 14000M in 2006.
* [[Reference:air-king|Air-King]]: the line with the longest documented use of Precision wording.
* [[Reference:pre-daytona-chronographs|Pre-Daytona chronographs]] — the 1937 Centergraph 3642 sits in the same Field Manual timeline entry as the 3003 and 3004, on the chronograph side.
* [[Reference:pre-daytona-chronographs|Pre-Daytona chronographs]]: the separate chronograph entry in the 1937 timeline.


== Shared references ==
== Shared references ==
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