Here is the Master 1 000 Hours series of tests: I did the Test No1 and 5, and obviously the Nr 4, to check the resistance to variations in temperature... At the end of these tests, I can confirm it works flawlessly. I didn't try the test Nr 6... I didn't ...
Also mine Deep-sea chronograph have the "1000 hours control"!!!! Not the gold medal but a sma engraved sign!!!! Proudly in the "club" even without Duometer! ...