It’s probably going to go back together no more broken than it was, at least.
This is a “fusee” style watch mechanism, made around 1878. Apparently at that point the fusee had been obsolete for over a hundred years, but this seems like it was quite a budget movement - it only has 3 jewels! Everything else is just metal on metal pivots.
The hallmarks in the case are: lion passant (sterling silver), three wheat sheaves with an upturned sword (Chester Assuary Office) and a gothic P, which indicates 1878 as the year of manufacture.
I thought the mainspring was a very beautiful colour.
Everything has been cleaned, rinsed and dried and I started reassembly but I’ll probably finish it tomorrow.
These are evil and a couple are missing or broken :(
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