The little white pins are just spacers that were used in the assembly of the windows since the grey putty stays squishy forever.
Have a look at the following thread--it eventually gets on to rebuilding one of those wing windows.
http://www.airforums.com/forums/f164...ld-105478.html
The windows on the 70's trailers apparently came in two configurations, one kind could be rebuilt without completely removing the window frame from the trailer, the other can't. At a glance your windows look similar to the ones I have, which had to be completely removed from the trailer in order to disassemble them. I took apart both of my windows, rebuilt them as single panes, saved the inner glass on each of them for the next time I have a broken window. It wasn't too bad. The worst part of the job was dealing with the four screws that hold the window frames together--they broke off on the first window, so I had to spend a lot of time digging out the broken screws. My second window used stainless screws and they came out in one piece.
good luck!
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