Andersen Balancer Stamped D46 7P27 2X7
A handy person from Branchburg NJ says:
October 5, 2013
I need two pair (right and left hand) of balancers for my Andersen double hung sash windows. I can't seem to match model of the ones I removed from the windows to your inventory. The windows are both 53L X 32W.
Tom from SWISCO responded:
October 7, 2013
Check out our 24-737. This can replace Andersen balance boxes with the stamp 7P27.