Just in general for the vintage: You see an arm with a nylon roller in the gutter. Now look what holds that arm so it can't get out of that track. Sometimes the track (felted rubber) is holding the window in place. What you want to do is get the roller out and tilt the window with the crank at the bottom and having moved the track it should come up and out.
I think this one is nuts and bolts with a metal thing attached to the bottom of the glass. Some types use rivots that must be drilled out and then you have to hunt down larger rivots than are common in hardware stores which is a pill,
T
Tom Greenleaf - MetroWest Boston - USA
http://www.acsource.com/ _________________________________________
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