Low beat movement..... isn't?!

[Nanuq]

I bought a 2846 for my Big Gonzo build and my builder says it's running at 28.8k bps.

Has anyone heard of this before or know how it could be doing this?

[freddy333]

Either you have a franken movement or the plate was signed with the wrong model number (unlikely).

[gran]

[Nanuq]

Either you have a franken movement or the plate was signed with the wrong model number (unlikely).

 

I thought franken too, but the original sales post from the prior/prior owner says it's a gen Tissot 2846. 

 

Without changing the wheels, how can a movement running 33% faster keep time?

[B3nj4min3]

Perhaps the shorter hairspring from a 2801 movement?

Since parts for the 2846 movements are slightly more difficult to get a hold of, someone who did a service on the movement could have used the shorter hairspring from the 28,800bph 2801.

I may also be talking complete rubbish so please excuse my post if I'm saying something that isn't even possible.

[Nanuq]

Hmmmmmmmmm  that's a good idea.