Automatic mainspring 771 for ETA 2821, 2824, 2827, 2830, 2832, 2833, 2839
Mainspring for automatic watches
Suitable for the following calibres: ETA: 2821, 2824, 2824.1, 2824.2, 2827, 2830, 2832, 2833, 2834, 2834.1, 2834.2, 2836, 2836.1, 2836.2, 2839
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