Casey from SWISCO responded:
May 17, 2021
Hello, I agree that the 82-243 looks like a promising replacement for your mortise lock. To confirm, you'll need to make sure that the dimensions on our product page match up to yours and that the slot that the thumb latch engages with sits at a 45-degree angle when in the locked or unlocked position. Thanks for posting! Side view of 82-243
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