Milgard operator and window lock

A contractor from san francisco says:
These windows were installed in 1999. I need to replace the operators and locks
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Bob from SWISCO responded:

Thanks for writing in. Past customers with Milgard casement windows have used our 38-139, but you'll want to carefully go over all the dimensions, especially the projection of the fork, to see if they match. If not, you'll also want to look at the 38-138, 38-095, or the 38-096 to see if one of these is a better match. 

As far as your casement operator goes, we'll need to see it in its entirety, including the link arms, from a bird's eye perspective, either removed from the window or at least with the window open. From there we'll do our best to match the proper replacement. 

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