Number on channel

A professional from San Diego, CA says:
Hello I'm ordering new Channel balances and the number stamped on the balance is 27 4 10 Caldwell.
Does that mean 2710 on the sash weight?

Thanks for the help
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Tom from SWISCO responded:
Hey, George. I'm not sure. I wouldn't necessarily disregard that 4. I think you might have a sash weight of 2740, but you should weigh your sash just to be certain. That's always better than guessing!
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