Royal oak Circa 1980 Ref.4100SA Steel and gold case Mechanical self-winding movement Caliber 2123 signed Diameter: 36mm Steel and gold bracelet
![1970's Audemars Piguet Royal Oak ref. 4100SA "Automatic 36mm, Gray Dial" - Lunar Oyster - Buying and Selling 1970's Audemars Piguet Royal Oak ref. 4100SA "Automatic 36mm, Gray Dial" - Lunar Oyster - Buying and Selling](https://media.lunaroyster.com/2019/06/987f932e-img_9338-1200x800.jpg)
1970's Audemars Piguet Royal Oak ref. 4100SA "Automatic 36mm, Gray Dial" - Lunar Oyster - Buying and Selling
![AUDEMARS PIGUET | ROYAL OAK, REFERENCE 4100 SA A YELLOW GOLD AND STAINLESS STEEL BRACELET WATCH WITH DATE, CIRCA 1985" | 愛彼| Royal Oak 型號4100SA 黃金及精鋼鏈帶腕錶,備日期顯示,錶殼編號520,約1985年製" | Important Watches | 2020 | Sotheby's AUDEMARS PIGUET | ROYAL OAK, REFERENCE 4100 SA A YELLOW GOLD AND STAINLESS STEEL BRACELET WATCH WITH DATE, CIRCA 1985" | 愛彼| Royal Oak 型號4100SA 黃金及精鋼鏈帶腕錶,備日期顯示,錶殼編號520,約1985年製" | Important Watches | 2020 | Sotheby's](https://sothebys-md.brightspotcdn.com/dims4/default/9bfa0e8/2147483647/strip/true/crop/1309x2000+0+0/resize/385x588!/quality/90/?url=http%3A%2F%2Fsothebys-brightspot.s3.amazonaws.com%2Fmedia-desk%2F50%2Fb1%2Fb11e70224a189b370e33a2ed698a%2Fhk0935-bksn5-2183-2.jpg)