Quote:
Originally Posted by Dirt
Thank you for tidying that up Peter 
I thought the test was about 2 weeks straight
It's a funny number with it being 15 days 
I do wonder how they came up with the sequence of the test.
The positional variation is pretty much a given, but the duration and temp variations(which sort of make sense) could've been any combination? |
Yes its only the bare uncased movement that sent to the COSC for testing not even dial hands or winding rotor are on movement.And for movements of Rolex size its costs around $140 plus for each movement test.But as Rolex is the biggest tester they and have there own machine to test the vast amount of movements expect they get a much better deal.And its a good job some of todays Rolex owners cannot see how the movements are tested at the Swiss COSC,on the 15 day environment controlled test they only tests movements at their barest functional level.And all the bare uncased movements are machine wound hundreds at a time by the winding stem.All automatic watches have there winding rotors removed,because the machine that winds them that fast it would damage the highly geared automatic winding mechanism.Even the dial and hands are removed special ones are fitted at COSC test centre. Movements are checked every 24 hours by electronic camera linked to central computer. These bare movements are loaded into magazines like bullets,the machine extracts the movement, reads it, winds it and returns it to the magazine,and some guys worry about winding there watch manually.
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