/fa/ - Fashion

>>15005196
>I've also heard people in /wt/ shit on the Powermatic 80
The base grade Powermatic 80 used in Tissots has a plastic pallet fork and escape wheel, and is a disposable movement engineered to be replaced at service.

The COSC version does not use plastic parts in the excapement, and does have a silicon balance spring, but still has some potential issues in the future.

Basically, the balance wheel is poised (balanced on its axis) and adjusted for rate at the factory by laser cutting the balance wheel. The balance wheel is then left with only two eccentric weights that can be used to alter its rate and poise in the future (you can see the two screws in the attached picture).

The open question is whether those two adjustment screws give enough of a range of adjustment for poise and rate that a Powermatic 80 COSC movement will be able to remain serviceable long term. That remains and open question, and I'm also unsure as to whether the Swatch Group is actually servicing the COSC versions instead of just replacing them at service like they do the low end versions.

If you don't have any intersest in mechanical movements and don't care that you will need to take it to a Swatch Group service centre wehre they are probably putting in a fresh movement into your watch every 5 years, the Powermatic 80 COSC is fine.