I REMOVED ONE OF THE BROOK WINDOW BALANCE FOR AVDERSEN,
THE NUMBERS ON IT DOES NOT MATCH ANY OF YOUR NUMBERS
THE NUMBER ON MY BALANCE IS C7 6P23 1 74
Tom from SWISCO responded:
August 7, 2014
I recommend our 24-637. This can replace balance boxes stamped with 6 23. That "P" doesn't matter so much, aside from letting me know which stamp is the right one!