Double Mortis??

A landlord from San Diego says:
Hi, we are missing the piece on the inside door frame that the lock goes into. Not sure if that is a mortis, or not. Any help would be greatly appreciated!
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Casey from SWISCO responded:

Hello,

It sounds like you might be looking for a keeper. If the specifications of your mortise lock match our 82-239, the 82-249 keeper should work for you. Thank you!

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