



Information
- Brand: Rolex
- Made: 1940
- Model: Oyster Perpetual
- Reference: 2940
- Calibre: A260
- Movement: Automatic
- Material: Stainless steel
- Features/complications: Bubble back
- Dial: Black dial with outer minute track featuring luminous hour indices with luminous Oyster hour and minute hands and sweep centre centre seconds
- Case dimensions: 31mm
- Bracelet/strap: Stainless steel bracelet
- Accessories: N/A
- SKU: 3370
Essay
Rolex created the auto-rotor movement from the Aegler movement in Hunter watches that featured a “perpetual motion” winding mass. Rolex subsequently patented its first successful perpetually self-winding wristwatch in 1932 and the Bubble Back was introduced in 1933 and featured the first auto-rotor.