Balance Spring Assmbly

A quick learner from Massachusetts, USA says:
September 11, 2022
I have the double balance spring as shown in the picture but the stamp on the spring near tongue just says 5K. Can you assist with proper replacement?
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Tom from SWISCO responded:
September 14, 2022

Hello! Your pivot shoe appears to be a match for our 15-177, which is designed to work with our Series 152 coil spring. Since your old spring is stamped with 5, that means you likely want the 5 pound S152-5 option.

I believe these parts can work for you but look them over and see what you think.
Coil Balance Shoe, Slate Blue
Coil Balance Shoe, Slate Blue
15-177
$3.47
5 lb Series 152 Coil Balance
5 lb Series 152 Coil Balance
S152-5
$4.80
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