looking for the part that releases the window so it can be dropped in to clean. They are on the top of the window and have prongs that go into the window casing, but the prongs are broken off. The number on the window is 12 10 92 88 I am told they are Vetter windows.
Paul from SWISCO responded:
July 27, 2017
I'm not sure if we have a top sash release lever that will fit your window. It would depend on the size of the forks. You can see our entire selection here.