Need help with Mortise lock for one of your handles

Question

I recently purchased the 82-086 handle set to replace the one the client currently has. I was wondering which mortise lock goes with it? The one on the door right now has a screw to screw measurement of 5 1/8" or 5 3/16"...something in that ballpark. The overall width is 1" wide. I have attached pictures to help with the discovery.
Thank you.

Bob · Accepted Answer

Thanks for posting. The 82-086 works with a few different mortise locks, but yours looks like it might be the 82-229. Please compare and let me know if you concur.

Alternate view of 82-229

Alternate image for 82-229