casement window crank

A contractor from Vineyard Haven, MA. says:
Truth Casement window operating system. Plate number. 40471
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Bob from SWISCO responded:

See our 39-031 or 39-155 Operators. The only difference between them is the link arm length, so compare both with your old hardware to see what matches best. For a new cover and handle, see our 39-107 and 39-114L

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