{"id":35966,"date":"2021-11-17T16:39:14","date_gmt":"2021-11-17T15:39:14","guid":{"rendered":"https:\/\/master-watch-parts.com\/product\/zugfeder-aufzugfeder-fuer-armbanduhren-taschenuhren-aufzugsfeder-mainspring-2\/"},"modified":"2026-10-25T13:00:49","modified_gmt":"2026-10-25T12:00:49","slug":"zugfeder-aufzugfeder-fuer-armbanduhren-taschenuhren-aufzugsfeder-mainspring-2","status":"publish","type":"product","link":"https:\/\/staging.master-watch-parts.de\/en\/product\/mainspring-for-wristwatches-pocket-watches-nos-2\/","title":{"rendered":"Mainspring for Wristwatches & Pocket Watches \u2013 NOS #2"},"content":{"rendered":"

Mainspring for wristwatches or pocket watches<\/a><\/h2>\n

Unused NOS mainsprings for wristwatches and pocket watches, brands such as AMA and STUSA, for manual-winding movements.<\/p>\n

The mainsprings offered here are unused stock in very good condition.<\/p>\n

Scope of delivery: 1x mainspring of your choice<\/strong><\/p>\n

(not for automatic movements)<\/strong><\/p>\n

* approx. 40% of the mainsprings are of the brand “AMA” with riveted, sharpened end piece – “S” shape – to be pressed into the barrel.<\/p>\n

approx. 40% of the mainsprings are of the brand “STUSA – SWISS -” with sharpened hook – “S” shape<\/p>\n

* approx. 15% of the mainsprings are of the brand “DYNA” – “S” shape<\/p>\n

#1:<\/strong> The mainsprings marked “#1”<\/strong> in the drop-down menu have a normal, round shape, not an “S” shape<\/strong> – secured, depending on the diameter, with a red ring or a wire, finished with end hook. See the last three photos.<\/p>\n

The diameter of these springs in the area of the end hook can be up to 0.25 mm larger than stated. We re-measured a few as spot checks and summarized the results below:<\/p>\n

stated —- actual<\/strong><\/p>\n

0.95-7.5-0.085-235 #1 — diameter 7.60 mm
\n<\/strong><\/p>\n

1.2-9.0-0.1-280 … diameter 9.15 mm<\/strong><\/p>\n

1.20×11.5×0.12×365 —- diameter correct<\/strong><\/p>\n

1.25×15.5×0.16×540 — diameter correct
\n<\/strong><\/p>\n

1.25x16x0.2×440 — diameter correct
\n<\/strong><\/p>\n

1.25×10.5×0.125×305 — diameter 10.60 mm<\/strong><\/p>\n

1.25×10.0x0.11×310 —- diameter 10.10 mm<\/strong><\/p>\n

1.30×10.5×0.115×325 #1 – diameter 10.60 mm
\n<\/strong><\/p>\n

1.35x12x0.14×360 — diameter 12.25 mm<\/strong><\/p>\n

1.35x11x0.12×340 — diameter 11.20 mm<\/strong><\/p>\n

1.35×10.5×0.115×325 — diameter 10.65 mm<\/strong><\/p>\n

1.35x10x0.11×310 — diameter 10.20 mm<\/strong><\/p>\n

1.35x15x0.185×410 — diameter correct<\/strong><\/p>\n

1.4×6.5×0.075×200 — diameter 6.60 mm<\/strong><\/p>\n

1.4×5.5×0.06×170 — diameter correct<\/strong><\/p>\n

1.4x8x0.09×255 — diameter 8.15 mm<\/strong><\/p>\n

1.4×8.5×0.095×265 — diameter 8.65 mm<\/strong><\/p>\n

1.4×10.5×0.115×325 — diameter 10.65 mm<\/strong><\/p>\n

1.4×10.5×0.12×320 — diameter 10.65 mm<\/strong><\/p>\n

1.4×11.5×0.10×490 — diameter 11.65 mm<\/strong><\/p>\n

1.4x13x0.16×360 — diameter 13.25 mm<\/strong><\/p>\n

1.4x15x0.185×410 — diameter correct <\/strong><\/p>\n

1.4x16x0.16×585 — diameter correct<\/strong><\/p>\n

1.45×7.5×0.09 — diameter 7.6 mm<\/strong><\/p>\n

#2: <\/strong>The mainsprings marked “#2”<\/strong> in the drop-down menu are, as shown in the pictures, delivered in an aluminum tray. These springs must be installed into the barrel.<\/p>\n