ETA 2850-401, Winding stem, thread: 100

• ETA original winding stem. Length: 1500
  

• Thread: 1.00 mm.
  

• Fits ETA cal: 2850, 2851, 2852, 2853, 2858, 2859, 2870, 2871, 2872, 2873, 2878, 2879
• Fits ESA cal: 9360, 9361, 9362, 536.111, 536.121

Versions: 28.800 A/h / 21.600 A/h.

• 2850 / 2851: manual wind.
• 2852 / 2853: manual wind date.
• 2858 / 2859: manual wind, day, date.
• 2870 / 2871: automatic wind.
• 2872 / 2873: automatic wind, date.
• 2878 / 2879: automatic wind, day, date.