It looks like the Arnold & Son DBG Skeleton has two watches in one case as it features two time displays with hours and minutes
Movement Arnold & Son A&S1309 | Hand-wound | Diameter: 35 mm | Thickness: 3.9 mm | Frequency: 21,600 (3 Hz) | Jewels: 42 | Hours, minutes, seconds, GMT hours and minutes, 24h indicator for local time and GMT | Power-reserve: 40 hours
Movement Arnold & Son A&S1309