Plumbing – need help in identifying bathroom sink faucet set

faucetplumbing

This set is most likely 30 years old. (We also have the matching tub set.) I'd like to replace all of the faucet innards or replace the entire set.
Any help would be greatly appreciated.

Many thanks.

see picture please
side view
cartridge
[broken piece from inside full assembly[4]
full assembly

Best Answer

I'll ante up with American Standard. Remove the top stem(s) under the handle(s), take it to the store & match up a replacement. Keep the old stem(s) until you're good & sure everything's proper.