Powermatic 80.111. What do you think about this caliber?
Powermatic 80 are calibers derived from the Eta 2824-2. By reducing the pace to 21600 A/h (and probably something else), Swatch engineers have got to improve the PR to an impressive 80h.
The official name of the PM 80.111 is ETA C07.111. It is used in several Tissot models like the PRX or the recently released Sideral. The escapement (pallet fork and escape wheel) is made of some kind of “plastic”. It has 23 jewels, two less than the Eta 2824-2. These two supposedly are the ones that would be used if it had a metallic pallet fork.
There are other types of PM 80 like the ETA C07.611 (no plastic parts) or the ETA C07.811 (no plastic parts and silicium hairspring).
PM 80.111. Plastic escapement. No jewels. Source: Inf.news
I was decided to buy a Tissot Sideral but now that I know about the plastic parts, I’m pretty unsure. People says it has a great accuracy but I am not confident about how it will age.
What do you think? What’s your experience?