IWC open face pocket watch
Switzerland, around 1971
Crown wound, calibre 972, adj. 5; 19 jewels, hour, minute, subsidiary second
Silver dial, silver hands
Watch case of stainless steel
Case diameter: 45 mm; Height: 9 mm
It was estimted that the calibre 972 was made in 3,600 examples between 1967 and 1973; it basically is the same as the Cal. 97 with the added shock resistance.
The Calibre 97 was IWC’s pocket watch movement starting in 1930 .