Quote:
Originally Posted by Russell996
I’ve never understood the instruction to be that you can ONLY wind it 8 turns (manual says 10), i‘ve understood it that you can start the watch on this amount of turns (10) but equally you can then fully wind if you wish. I always 3/4 wind after a watch stops - I will ask.  |
"The automatic winding mechanism has been overhauled, starting from a more secure nut holding the rotor instead of a simple screw; a spiral spring on the click wheel for smooth and adjustment-free ratcheting; the addition of an uncoupling reduction wheel with integrated clutch for the ability to manually wind the barrel; and a similar uncoupling wheel with a unidirectional clutch.
There is a patent pending for the uncoupling clutches as well as patents for a few features in the weekly calendar mechanism."
This is from the Quill and Pad review of the 5212A. Check it out but older automatic movements should not be regularly fully wound unless they are designed for both manual winding and automatic winding. Best to invest in a winding box if not regularly worn. When I bought an automatic Grand Seiko it specifically said the watch was designed to both be manually wound and automatically with no harm to the movement.