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This is an IWC (International Watch Company) Schaffhausen Cal.

8531 Old Inter automatic watch.

This watch was manufactured in 1964-1965 and is regarded as a masterpiece with IWC's original Pellaton-type self-winding mechanism.

The back of the watch is engraved with pm900, which is an old platinum engraving.

There are some scratches on the windshield and case, please check the pictures.

- Model: Automatic watch - Color: Silver - Material: pt900 - Features: Date indicator - Band type: Bracelet - Case diameter is approx.

35mm (excluding crown), length (lug to lug) is approx.

42mm