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3 April 2024, 11:21 AM | #1 |
"TRF" Member
Join Date: Jan 2019
Real Name: LtCol R
Location: Mtns-NM-MT
Watch: 1680Red-551214060M
Posts: 237
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More details of the earlier Swiss and Rolex contributions to accurate pre-COSC
testing and examinations revealed observatories at Neuchatel (18661975) and Geneva (18731967). The Swiss BO's were in existence between 1877 and 1956 for chronometer testing. In 1910 and 1914, Rolex submitted two separate references for testing and both received certificates as meeting accuracy standards as chronometers. The Swiss 196173 standard required a mean daily rate in 5 positions of -1/+10 sec daily rate. In 1973, the the BO's came under the Swiss C.O.S.C. which specified a daily rate in various positions of -4/+6 seconds to be certified as chronometers. Rolex/Tudor probably submit more watch movements for chronometer certification than any other Swiss watch manufacturer. That also most probably means the most chronometers certified world-wide. Something to reflect on. |
3 April 2024, 07:35 PM | #2 | |
"TRF" Member
Join Date: Mar 2012
Location: Brisbane
Watch: DSSD
Posts: 7,893
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Quote:
It's a fact and has been the case for quite a long time. It's understandable really, as i think i saw somewhere recently that Rolex make more watches than the other 3(maybe 4) other combined top manufacturers in the world in their own right and keep in mind that all Rolex movements are COSC tested prior to the in-house Superlative Chronometer series of tests. Basically, it's entirely fair to say that nobody else can ever come close to the crown in that regard. Of course there is METAS now, so the mix of accurate watch movement testing is rather different. But the crown is so far out in front that it's not even a race. It just is what it is and impressive. Thanks for delving deeper into it |
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