Replacement Mechanism needed

A quick learner from Anaheim, CA says:
Please help me identify this part so I can order a replacement.
User submitted photos of a mortise lock.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
We have two possible replacement options. The first is our 40-198 mortise lock, with a depth of 1-1/2". The second is our 40-211 complete handle set, whose mortise lock has a depth of 2". See if either of these match the dimensions of your latch.
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