![Reference 3970/E | A yellow gold perpetual calendar chronograph wristwatch with moon phases, Circa 1991 | Important Watches | 2023 | Sotheby's Reference 3970/E | A yellow gold perpetual calendar chronograph wristwatch with moon phases, Circa 1991 | Important Watches | 2023 | Sotheby's](https://sothebys-md.brightspotcdn.com/dims4/default/99b6545/2147483647/strip/true/crop/3543x3543+0+0/resize/1024x1024!/quality/90/?url=http%3A%2F%2Fsothebys-brightspot.s3.amazonaws.com%2Fmedia-desk%2F13%2Fe6%2Fdcbab05346119e61df390476300c%2Fn11271-9wstd-1.jpg)
Reference 3970/E | A yellow gold perpetual calendar chronograph wristwatch with moon phases, Circa 1991 | Important Watches | 2023 | Sotheby's
![Vintage Patek Philippe Ref.3970 18K Rose Gold Chronograph Perpetual Calendar from 1989 – Now at 2Tone Vintage Watches Singapore. Vintage Patek Philippe Ref.3970 18K Rose Gold Chronograph Perpetual Calendar from 1989 – Now at 2Tone Vintage Watches Singapore.](https://www.2tonevintage.com/wp-content/uploads/2021/12/patek-philippe-ref3970e-rose-gold-1989-img-cat1.jpg)
Vintage Patek Philippe Ref.3970 18K Rose Gold Chronograph Perpetual Calendar from 1989 – Now at 2Tone Vintage Watches Singapore.
![Patek Philippe Perpetual Calendar Chronograph for $150,275 for sale from a Trusted Seller on Chrono24 Patek Philippe Perpetual Calendar Chronograph for $150,275 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/32930548-4c4rmewptevetzanf5ozg660-ExtraLarge.jpg)
Patek Philippe Perpetual Calendar Chronograph for $150,275 for sale from a Trusted Seller on Chrono24
![Patek Philippe Perpetual Calendar chronograph 18 ct gold manual winding Kal. CH27-70/Q Ref. 3970/2 | 2203229 Patek Philippe Perpetual Calendar chronograph 18 ct gold manual winding Kal. CH27-70/Q Ref. 3970/2 | 2203229](https://pics.zeitauktion.com/2022/2203229_sw6_theme1_2k.jpg)