
Loop Mainspring-5/16" X 0.15" X 42"
MS-STshoulder
Loop End Mainspring
11/16" X 0.014" X 120"
17.5mm X .36mm X 3048mm X 50mm barrel
Often used on Seth Thomas T& S Shoulder movements
High Quality. Made in Germany
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MS-STshoulder
Loop End Mainspring
11/16" X 0.014" X 120"
17.5mm X .36mm X 3048mm X 50mm barrel
Often used on Seth Thomas T& S Shoulder movements
High Quality. Made in Germany