1970 window openers

A home owner from Ocala, Fl says:
Original to 1970 house I believe. Crank handle is loose inside unit and will not screw back in, just loose. Windows don't open.
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Bob from SWISCO responded:

Without seeing the operator out of the window with the hole pattern on the top and bottom tabs clearly displayed, I am afraid I can't say what you need. It might be the 39-054, but you'll need to compare the dimensions to confirm. 

A home owner from Olympia, WA says:
Need to replace center crank arm on @1970 kitchen garden window that lifts open at the top. 9 1/2" h from bolt to top of window frame. What do you recommend? Alternatively, could mount something that holds a window open. What are your ideas?
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Tom from SWISCO responded:

Unfortunately, we don't sell replacement hardware for these old garden windows. I don't believe they're even made anymore. Your best bet is a local hardware store that might service homes in the area. It's not a guarantee but they may have older parts in stock you can use. Note that I'm not talking about big box stores, but more like a local mom and pop establishment. 

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