Reference Library
Waltham 6s Pocket Watch Mainspring Part Numbers
The mainspring provides power to the mechanics of the watch. When a mainspring breaks or no longer offers enough energy for precise timekeeping, a replacement will be required. Measure the dimensions of the old mainspring using a micrometer, and use the chart below to find proper replacement for any American movement. Note: Using proper tools for mainspring installation is highly advised.
Manufacturer | Movement Size | Part Number | Alt. Part Number | Length (in) | Width (mm) | Thickness [Strength] (mm) | End | Purchase on eBay |
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Waltham | 6 | 2215 | 16 | 1.90 | 0.21 | ![]() T-End |
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Waltham | 6 | 2217 | 16 | 1.90 | 0.19 | ![]() T-End |
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Waltham | 6 | 2219 | 16 | 2.10 | 0.15 | ![]() Hole |