MS-H31/33 - Mainspring 15/32" X .0120 X 43 5/16"
Frankenmuth Clock Company
SKU: MS-H31/33
MS-H31/33 - Mainspring 15/32" X .0120 X 43 5/16"
12 X .32 X1150
Fits Hermle #31 or #33 Barrels
Hole End High Quality. Made in Germany