Window part with 27B on it

Question

I have a window with a 27 b and the otherside is 27 d see pics for rivet placement

Gut says get two inbetween

What stamp should i order?

Tom · Accepted Answer

The rivet placement is irrelevant, so don't worry about that. With the two different stamps in the window, you need to remove the sash and weigh to see which one is the right one and which one is not. Someone likely mis-repaired this window at some point.

As for the balance's identity, I can't tell what you need without seeing both attachments. I can make out the top but not the bottom. See if you can find what you need among our half-inch channel balances