Help Identifying Balance

A home owner from MD says:
Hello,

I would appreciate any help in identifying my balance. It measured 28" in length, 1/2" width. It also has a marking of "27 4 EL Caldwell" Hopefully my pictures provide enough information. Thanks
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Bob from SWISCO responded:

See our S380-28 or S385-28 to start. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. If both seem off, let me know what the depth of your balance's shoe is. For a new stamp option choose 2740. 

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