Casement window hinge

A home owner from Seattle, WA says:
Casement window hinge with rusted rivet. Short arm has number "31272" on it. Longer arm has no visible marking but is difficult to access so I may be missing it. On the window itself are the following markings:
850 casement P.L. 010-004
Best built bbi-1

Thanks for the help!
User submitted a photo of window hardware.
Profile picture of Paul
Paul from SWISCO responded:
This looks like one of the arms on a hinge set. See our 36-013-10 and let me know if this would make a good replacement for your hardware.
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