Coil balance for American Craftsman windows

Thanks for writing in. The pivot shoe looks like our 15-177. The coil springs look like older versions of our Series 152. The Series 152 do not have that folded tongue; instead they attach to the pivot shoes via screws like our 33-072. Your stamp indicates you need our S152-6, which supports 6 lbs of weight individually. Let me know if you have any further questions.