Identifying a mortise lock

A handy person from Hopkins, MN says:
I have a mortise lock that is defective. I think a spring is broken. The lock hook tends to get stuck inside rather than "reaching out" to grab the catch on the door frame. I think I need a 82-218 but I'm not 100% sure. I don't know who made the door. The inside handle looks like a 82-035 but the outside handle is different. Of course, this is all from appearances. I was hoping for part numbers.

Please help!

User submitted photo of the user's defective morise lock.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I believe your mortise lock is closer to our 82-226. Go online to our Web site and check out the product picture for the 82-226 and see how it matches up to your original lock.
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