This is a custom-built clock mainspring winder, fabricated by an old-time clock man. It works with nearly all clock main springs, both hole-end and loop-end. Comes complete with seven-piece let-down set (compare with Merritt\'s P-110B), and mainspring nine-piece sleeve set (compare with Merritt\'s P-1368A), absolute locking winder for both left and right hand winding. Also includes spring barrel holder. This device clamps into a vice easily for fixed winding. A better winder than you can buy elsewhere. Buy it!

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