Window Keeper with stamp 31787

A home owner from Chatham says:
I am (desperately) trying to find window keepers. builder went bankrupt and I don't know where he got from. The keeper is very similar to the 38-051 shown except it is taller, hole spacing 1 1/4" . It has the number 31787 stamped on it but no manufacturer - any clues, I need 22 of them
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Donna from SWISCO responded:
See the newly added part 38-134, it is a window keeper for a Marvin window. The 38-134 looks similar to the 38-051 but has the 1-1/4" installation hole spacing that you are looking for. The 38-134 also has a taller inside reach.
A home owner from Elk River, MN says:
looking for a Marvin keeper stamped 31344, do you know where to get these?
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Paul Sr. from SWISCO responded:
I am not familiar with a Marvin keeper stamped 31344. Does it look like any of the window keepers on Can you send us a picture of one with details such as measurements?
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