It’s got a TV style dial, and a fairly unique case.
On this movement, Tissot heavily used plastic components. The whole movement looks like it was a cost-cutting exercise from start to finish. I count 10 jewels, so only the balance and escape wheel have jewels, and there is as much plastic as you can get into a movement. Only the top side of the pallet fork is jewelled, thus the 10 jewels, and not 11.
The case back is solid.
The rotor is held in place by a circlips, and has a wire spring ratchet that allows the rotor to wind the mainspring in one direction.
Just in case you haven’t seen enough plastic yet 😉
Yes, the crown wheel bridge is plastic, too.
The bottom plate.
Almost everything taken apart.
I can’t get hold of a new mainspring, but the old one doesn’t look too bad, so I will use it again.
I start putting the movement together.
When I put the gear train together, I notice that the fourth wheel wobbles. And there is a good reason for that – the pivot hole in the plate is completely worn out, and I need a new plate. Thanks to eBay, I find a complete movement, which has a good wheel bridge.
The same photo of the new wheel bridge – perfectly round.
The balance is back in, and the movement starts ticking. I don’t get a decent image on the timegrapher, and I notice that the hairspring touches the outer stud when moving, so I have to reshape it a bit.
A true child of its time.