Marvin casement window operator

A quick learner from Walnut Creek, CA says:
I have 3 broken operators. 1 is stamped 30470LH on the bottom of the long arm. It is a 2 arm operator mfgd by Truth apparently The short arm is stamped 20810. My second is the RH version of this operator. My third is missing, but the window is the same width as #1 above. So I assume I need two 30470LH's and 1 30470RH. Windows were installed in 1989. Hopefully you can find replacement operators with this info.

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Paul from SWISCO responded:
Please start by looking at our 39-031 and 39-032. Carefully compare our pictures and dimensions to your own hardware to confirm that they match. If not, please show us a couple pictures of yours out of the window so that we can find a better replacement option.
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