Peachtree window balance

I'm not sure what you have, unfortunately. We have dozens of different balances with these stamps. They're not product codes or anything, they just indicate the strength of the spring. Our service requires clear and unobstructed photos of the hardware in question at minimum.

In order to figure out what Series this is, I need you to remove an undamaged version of this balance from the window and show me clear pictures of the top and bottom nylon fittings. I will also need to know the dimensions of these fittings.

Please also double check the length of the metal channel in each case. They should both be 37". The length measurements you gave are very, very peculiar.