Andersen sliding door lock

A quick learner from Missouri says:
Markings: 2573558
7700-14
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Bob from SWISCO responded:

Hello there. I believe this mortise lock is an older version of the Andersen 82-037. Please compare. For the thumb lever, see our 82-043. Let me know if you have any questions.

Alternate image for 82-037
Alternate image for 82-037
Detail of receiver 82-037
Detail of receiver 82-037

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