Need Viking Balances

A home owner from Scappoose, Oregon says:
It appears that I need about 6 or 8 of these things. They appear to be like the 21" Series 395, but the numbers stamped on the old balance is 2090 31 and that does not seem to fit. Am I looking in the wrong place?
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Casey from SWISCO responded:

Could we have you send us detailed photos of your balances over to us? We'd also like for you send us over the metal length measurement of the balance. We'd like to see if we come up with the same suggestions as you have. 

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