Double hung windows are wood with no identifying markings. Probably installed in the late 60's. The windows are in excellent condition. The windows are of the type where you position the window in the middle of the opening and push the window to one side where the vinyl track will compress and you pull the window out of the track on the other side. The plastic/metal attachments on the end of the spring has broken on many of the windows. The included pictures show the top and side image of the attachment along with the metal part that is attached to the bottom of the sash. The springs seem to be in reasonable shape and of varying length, which I guess is dependent on the height of the window?
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