Bay window balance

A handy person from IN says:
April 13, 2017
This window was put in around 1983. The number stamped on it is F39 4#27 27 either A2 or R2
Andersen balance
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Tom from SWISCO responded:
April 18, 2017
The key stamp here is 4#27, I believe. However, this is a bit of an odd one. Can you show me a picture of that stamp in particular? Sometimes seeing how the numbers are printed is just as important as the numbers themselves.
A handy person from IN says:
April 18, 2017
After looking at the stamp under a magnifying glass it looks like F39 9#27 7 RP
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Tom from SWISCO responded:
April 20, 2017
Perfect! Based on your stamp of 9#27, I recommend our 24-939.
Andersen Sash Balance, 927, 931, 937, 939
Andersen Sash Balance, 927, 931, 937, 939
24-939
$54.20
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