![Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Perpetual Calendar – Flyback Chronograph ~ Case: 45mm – Gold – 17.5mm Thick ~ Water Resistance: 120M ~ Movement ( Calibre Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Perpetual Calendar – Flyback Chronograph ~ Case: 45mm – Gold – 17.5mm Thick ~ Water Resistance: 120M ~ Movement ( Calibre](https://pbs.twimg.com/media/GEIwFZiWcAA1qMV.jpg)
Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Perpetual Calendar – Flyback Chronograph ~ Case: 45mm – Gold – 17.5mm Thick ~ Water Resistance: 120M ~ Movement ( Calibre
![Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Flyback Chronograph - Perpetual Calendar ~ Case: 45mm - Rose Gold - 17.3mm Thick ~ Water Resistance: 120M ~ Movement (Calibre Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Flyback Chronograph - Perpetual Calendar ~ Case: 45mm - Rose Gold - 17.3mm Thick ~ Water Resistance: 120M ~ Movement (Calibre](https://pbs.twimg.com/media/FvjJFR3WIAgVuLR.jpg)
Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Flyback Chronograph - Perpetual Calendar ~ Case: 45mm - Rose Gold - 17.3mm Thick ~ Water Resistance: 120M ~ Movement (Calibre
![Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Perpetual Calendar – Flyback Chronograph ~ Case: 45mm – Gold – 17.5mm Thick ~ Water Resistance: 120M ~ Movement ( Calibre Watchfinder & Co. on X: "The IWC Ingenieur IW381701 ~ Functions: Perpetual Calendar – Flyback Chronograph ~ Case: 45mm – Gold – 17.5mm Thick ~ Water Resistance: 120M ~ Movement ( Calibre](https://pbs.twimg.com/media/GEIwFZjXAAEhrwb.jpg)