Need coil balances

Question

I'm looking for some window coil balances full set ups. As far as identifying markings all I see is the letters "DL" written on coil and the letters a b c d e f written down the sides of the plastic housing in two places.

User submitted photos of a window balance.

Tom · Accepted Answer

Please see our 15-177 pivot shoe and Series 152 coil spring. I think you'll find these match what you have quite well. I'm just not familiar with the stamps on the old spring. Can you tell me how much the sash weighs?