Help identifying tub faucet brand

[tburm]

We moved into our house roughly 2 years ago and inherited all the current fixtures. Recently, the handle for faucet/sprayer diverter (which had been leaking since we moved in) popped off. The handle appears to consist of a cam on a spindle, and behind the cam is a threaded piece that can slide up and down the spindle. I believe that to reinstall you're supposed to slide the outer housing off the spindle, screw in the threaded piece, then slide the housing back on and tighten a small screw on the side, much like an old fashioned door knob. The problem is, even after soaking in vinegar and spraying with WD-40, I can not get the spindle to budge to remove the outer piece, which makes it impossible to screw in the threaded piece.

TL;DR, I need a replacement part for the faucet below, but I have no idea what brand it is.

 

[Tuttles Revenge]

Take a close up photo of the hot or cold handle. The detail of those will make ID easier. Rohl, Newport Brass or Kingston are contenders.

Pretty confident its Newport Brass:

Newport Brass Chesterfield Exposed Tub and Hand Shower Set Wall Mount Polished Chrome - 934/26 - Newport Brass Faucets

For wall mounted configurations Solid brass construction ADA Compliant cross handles with lever diverter Quarter-turn washerless ceramic disc valve ca...

newportbrassfaucets.com

Tho, looking at the parts breakdown, they may have changed the diverter. So you'll probably want to contact them directly to see if they have a solution.