The sticker on the window says H-LC30-48x78, series 6210/6230/6230J/6270. The sash is about 35" H x 34" W (there are slight variations in the 8 sashes). They weight about 28 lbs.
My best guess after looking at the pictures on your site is that the balances are S385-33 3240 and the top sash guides are 18-188.
The guides are not exact and I'm wondering if they work with the S385 balances. I've marked up one of the dimensioned photos that I found online with the differences.
Please take a look at my pictures and let me know if you need anything else from me. I plan to replace the balances and top sash guides on all of our single hung windows once I find the right parts.
Thanks,
Brendan C
