or names of someone in the SF Bay area who can repair steelcase windows?

What about the other windows require "repair". I think the number of contractors that are going to have the know-how to work on a 70 year old steel window is going to be few and far between.

Ventana Aluminum in San Francisco manufactures French casements (or did). You also have Paramount Aluminum in Oakland and All Weather in Vacaville. They are all wholesale but contact them to see who their local dealer(s) is.

I can't find Paramount--is that the name?

I just googled them and their address came up as 1717 kirkham in oakland. I haven't had any contact with them for several years so they may not still in business.