Caldwell 27 4 JJ

A home owner from Indy says:
Not sure of weight on this. Matches Series 380 I believe.
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Tom from SWISCO responded:
I'm afraid I cannot confirm what Series balance it is you have. The stamp only tells us how strong the spring is. You mentioned that yours is similar to the Series 380 balance. Does it differ in any way? We recommend comparing the dimensions of the nylon caps that come with it to your own. That is the best way to confirm that they are the same.
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