📋 Product details
Mainspring for wristwatches or pocket watches
Unused NOS mainsprings for wristwatches and pocket watches, brands such as AMA and STUSA, for manual-winding movements.
The mainsprings offered here are unused stock in very good condition.
Scope of delivery: 1x mainspring of your choice
(not for automatic movements)
* approx. 40% of the mainsprings are of the brand “AMA” with riveted, sharpened end piece – “S” shape – to be pressed into the barrel.
approx. 40% of the mainsprings are of the brand “STUSA – SWISS -” with sharpened hook – “S” shape
* approx. 15% of the mainsprings are of the brand “DYNA” – “S” shape
#1: The mainsprings marked “#1” in the drop-down menu have a normal, round shape, not an “S” shape – secured, depending on the diameter, with a red ring or a wire, finished with end hook. See the last three photos.
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:
stated —- actual
0.95-7.5-0.085-235 #1 — diameter 7.60 mm
1.2-9.0-0.1-280 … diameter 9.15 mm
1.20×11.5×0.12×365 —- diameter correct
1.25×15.5×0.16×540 — diameter correct
1.25x16x0.2×440 — diameter correct
1.25×10.5×0.125×305 — diameter 10.60 mm
1.25×10.0x0.11×310 —- diameter 10.10 mm
1.30×10.5×0.115×325 #1 – diameter 10.60 mm
1.35x12x0.14×360 — diameter 12.25 mm
1.35x11x0.12×340 — diameter 11.20 mm
1.35×10.5×0.115×325 — diameter 10.65 mm
1.35x10x0.11×310 — diameter 10.20 mm
1.35x15x0.185×410 — diameter correct
1.4×6.5×0.075×200 — diameter 6.60 mm
1.4×5.5×0.06×170 — diameter correct
1.4x8x0.09×255 — diameter 8.15 mm
1.4×8.5×0.095×265 — diameter 8.65 mm
1.4×10.5×0.115×325 — diameter 10.65 mm
1.4×10.5×0.12×320 — diameter 10.65 mm
1.4×11.5×0.10×490 — diameter 11.65 mm
1.4x13x0.16×360 — diameter 13.25 mm
1.4x15x0.185×410 — diameter correct
1.4x16x0.16×585 — diameter correct
1.45×7.5×0.09 — diameter 7.6 mm
#2: The mainsprings marked “#2” in the drop-down menu are, as shown in the pictures, delivered in an aluminum tray. These springs must be installed into the barrel.
- The information in the drop-down menu stands for:
Width (mm) – diameter (mm) – thickness (mm) – length (mm)
For example:
1.8 – 11.0 – 0.12 – 380
Not all information is immediately visible in the drop-down menu; please scroll down.
Very good quality
🚚 Shipping & Delivery
🌍 International Shipping
- ✈️ Shipping with tracking
- 📍 Item ships from Germany
- 🎁 Free shipping to many countries from €150 – shipping costs ›































