Anderson window balance B24 4P1947 6
A quick learner from Whiteford, MD says:
June 19, 2013
I have an Anderson balance (we built the house in 1977), code in bottom right corner is B24 4P1947 6. Do you have two replacements?
Tom from SWISCO responded:
June 20, 2013
You might want to check out our 24-431 Andersen sash balance. This can replace balance boxes with the stamp 4P19.