My 1979 house has Alcoa aluminum windows that do not tilt, they just go up and down (but only the bottom half). I'd like to replace all of the balance spring sets (plus the handles, locks, gasket and the little stopper tabs at the top!), but I don't have a clue of what the part numbers would be. If possible, I'd like to get identical premade units rather than having to put them together myself.
I've attached three collage photos to show you the channel, top plastic piece and bottom plastic piece from various angles. The measurements are as follows:
Channel: 25" x 5/8" x 5/8", with "2430" stamped on it
Top piece: 1 3/4" long (including tabs at end set into channel), just under 5/8" wide and 3/4" deep
Bottom piece: 1 1/8" long (or more - I can't see the end because it's under the little pulleys), 5/8" wide and 1 1/4" deep
Please take a look and let me know what I need. Thank you so much in advance!
