Need replacement coil spring system

A quick learner from ohio says:
I need 12 of these balances, I don't know which ones to order and there are no markings on the part
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Casey from SWISCO responded:

Thank you for contacting us. Your pivot shoe looks similar to our 15-177. This can be used with the Series 152 coil spring. On the actual spring, there should be a number or marking stamped on it. You will need that information when ordering. Look over both pieces mentioned and let us know if you have any other questions. 

A quick learner from ohio says:
10K is stamped on the spring itself
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Casey from SWISCO responded:

Thank you for the information. We do not offer a 10 pound coil spring itself, but you can use two of the S152-5 on each side to accommodate the 10 pound coil spring. Have a look and let us know if you have any other questions. 

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