marvin double hung balances

A contractor from new jersey says:
i have a wood true divided light double hung. i think from 1988 the balances are in vinyl jamb liners and are marked w14r. i need two for the lower sash.
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Paul from SWISCO responded:
Thanks for posting. Marvin windows have been known to use our Series 751 in the past. Is that what you have? If not, we will need to see a few pictures of your balance removed from the window so that we can find a better match.
A contractor from new jersey says:
Thanks paul it looks like the 751 can i order based on the numbers stamped on the old balance w14r? Eric
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Paul from SWISCO responded:
Yes! With a stamp like that, I would recommend the 14R option for the S751-15.
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