A vintage watchmakers or instrument makers douzieme thickness gauge.

There is a Lighthouse plus Hand with Arrow trade mark to one arm.

The arm is also stamped '1944' with the Broad Arrow military mark.

The brass scale is divided into twelfths (douzieme is French for twelfth) up to 72 and also stamped '56' with the Broad Arrow mark.

The back of both legs are stamped 161.

Firm sprung movement.

All parts move freely.

6 inches (150mm) overall length.