Product Description
Nu Vigor Mainspring number 521
"for TIMER"
This is a New Old Stock item, unused and unopened.
Dennison - 8 9 30
Metric - .170 .013 76.20
Picture is representative of the product, but may not be the exact item you will receive.
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Dennison Width 8
Dennison Strength 9
Dennison Length 30
Metric Width .170
Metric Strength .013
Metric Length 76.20
End Type Hole
