Hey there Fritz I think our 922's were produced fairly close to each other, our 992's were likely produced the same day with the serials only 12 apart.
I'll throw in a model 1888 riverside too
Waltham Ball (complete with incorrect ratchet wheel)
Hamilton 992E
Waltham Ball (complete with incorrect ratchet wheel)
shouldn't be hard to find a regulator for that 992, it was missing from my 992B and the local watchmaker had one in stock!
Probably hand made by an old-school watchmaker at a crusty old bench!