S751-18 channel balance with 16HD stamp?

A home owner says:
November 11, 2014
My channel balance is stamped J 16HDB and is 18in. long for an old late 80's Norco tilt wood window. Looks similar to the 18" Series 751 Channel Balance
Product Code: S751-18. Will this one work?

Thanks So Much
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Paul from SWISCO responded:
November 14, 2014
It's possible that our Series 751 is a match, yes, but I can't say for sure based on your stamp. All that tells me is how strong the spring is and the length of the metal channel.

Speaking of the length, though, yours should be 17" long, judging by the stamp, not 18". Double check just to make sure.
A quick learner from Harrisville, RI says:
November 14, 2014
It definitely is 18" long and is stamped J 16 HDB.
User submitted photos of a window balance.
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Paul from SWISCO responded:
November 17, 2014
Bizarre! In that case, please give us the weight of the window so that we can determine the proper stamp for an 18" balance. Thank you!
A quick learner from Harrisville, RI says:
November 20, 2014
The weight of the window is 10 lbs 8 oz.
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Paul from SWISCO responded:
November 21, 2014
Great, thank you. In that case, I recommend our S751-18 channel balance with a 17R option. Two balances with that option will carry a window sash weight range of 10 through 17 pounds.
18" Series 751 Channel Balance
18" Series 751 Channel Balance
S751-18
$10.45
How to install a ribbed tilt channel balance with knife lock shoe
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