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Old 9 May 2020, 05:53 AM   #1
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Join Date: Jul 2011
Real Name: Rob
Location: Boston, MA
Watch: 1530
Posts: 3,527
Turn-O-Graph references

I realized I was a bit fuzzy on Turn-O-Graph chronology so I put this together. If I've forgotten anything or gotten the timelines slightly off let me know!

Turn-O-Graph timeline:

1952-1953: Ref. 6202 debuts, the first Turn-O-Graph. While the steel model resembles the soon-to-be-released Submariner, the two-tone model has a gold bezel that most associate with the later "Thunderbird" models. A few 6202's are named "Monometer."

1953-1956: Ref. 6309 ditches the Sub-style bezel in favor of the gold "Thunderbird" one. Full gold is now an option, as is a left-hand crown.

1956-1959: Ref. 6609 is "basically the same as 6309 but with updated 1065 movement (based on the cal. 1030 but with date)" according to adam78. This is the model that sparked the nickname "Thunderbird" because Rolex famously gifted some to the USAF Thunderbirds.

1957: Ref. 6602, a rare Datejust model called the "Transcontinental," is the only Rolex ever made with a 12-hour rotating bezel afaik. My apologies to eyeisman who posted this one here years ago; I was dismissive and assumed it was fake. Some assume 6609 is the correct model number because there is also the entirely different 6602 moonphase. Sotheby's calls it a "6602/6609" but 6602 is what's actually engraved on the case in every known instance. Here's a TRF thread about another example.

1959-1976: Ref. 1625 gets a movement upgrade to the Caliber 1500 series. At first it sports a 1565 movement, with 26 jewels vibrating at 5 beats per second. Starting in 1965, the 25-jewel 1575 movement ups the rate to 5.5 beats per second while increasing the power reserve from 42 to 48 hours.

1977-1987: Ref. 16250/16253/16258 gets a movement upgrade to Caliber 3035, now vibrating at 8 beats per second like modern Rolexes do.

1988 - 2003: Ref. 16263/16264 gets upgraded to a sapphire crystal and Caliber 3135 movement. No more full gold models.

2004-2011: Ref. 116261/116263/116264 got a more modern case, new bezel design, and Caliber 3135. Rose gold + steel is a new option. Small numbers of a special edition with a green seconds hand mysteriously hit Japan in 2011, and a few European AD's a couple years later (though for some reason they have 2005 serial numbers).
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