Tissot Powermatic 80 Movement
Interesting video that came up in my YouTube feed that does a pretty good job of explaining how the Powermatic 80 differs from a ETA 2824-2 & how the Tissot version with plastic escapement is different to the versions used by Hamilton & Rado for example.
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Andrew
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6.75” / 17.15 cm
I was under the impression Tissot used the plastic escapement in some but not all of their models that use the pm80. I thought some had a regular one.
I have owned a few watches with the Powermatic 80 movement inside. Indeed it is meant to be based on the ETA2824, but I see little resemblance. Different power reserve, different beats per minute, and it can't be regulated. Because of the plastic parts the beat error on a timegrapher looks crazy. All that said, they are extremely accurate from experience
I have owned a few watches with the Powermatic 80 movement inside. Indeed it is meant to be based on the ETA2824, but I see little resemblance. Different power reserve, different beats per minute, and it can't be regulated. Because of the plastic parts the beat error on a timegrapher looks crazy. All that said, they are extremely accurate from experience
They really just differ in a handful of parts though. The mainspring, escapement and balance. You can swap the mainsprings between a 2824 and the Powermatic 80 to get a 4 Hz watch with 80 h of power reserve. It would require a lot of tweaking to get it accurate though.
https://www.youtube.com/watch?v=n7gQPXVXNsA
I'm also pretty confident that the movement can be regulated, finding someone willing and able to do so is a different matter of course. It has a free sprung balance with two tiny weights, as explained in OPs video, which at the factory are moved into position by what is alleged to be a laser guided system ("laser regulated" as they call it). If you are on a mission to do so, then you most definitely can move those weights yourself with a screwdriver and change the rate in the process. One is probably not supposed to do that but I tend to do a lot of stuff that I'm not meant to be doing so there's that 😉
I have owned a few watches with the Powermatic 80 movement inside. Indeed it is meant to be based on the ETA2824, but I see little resemblance. Different power reserve, different beats per minute, and it can't be regulated. Because of the plastic parts the beat error on a timegrapher looks crazy. All that said, they are extremely accurate from experience
Same experience. On a timegrapher the beat error of my Powermatic 80 powered PRX looks bad, but accuracy is good. On wrist I'm averaging +3 to +4 spd, so no complaints!
Good video, I'll have to check out some of his other content. Bonus: learning what the Longines L888 movement really was!