A home owner says:
July 27, 2016
The picture clearly shows the markings. the plastic caps required are unknown to me at this time. the one on the pictured balance is incorrect. i will pursue their id after i learn where to order the balance.
Paul from SWISCO responded:
August 1, 2016
I'm afraid I don't understand your question. Are you looking to identify your Series? If so, I cannot tell what you have based on the stamp alone. That's not an identification mark, that just tells you how strong the spring is. I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.