Cardboard box with plastic inner tray, originally holding 10 wristwatch heads. 21 x 10 x 2 cm.
The MIDO Watch Company, founded by George A Schaeren at Bienne in 1918, now part of the Swatch Group.
This box carries the date of 1966 on its base as well as a Swiss Patent number: 87 669.
In good used condition, the insides clean, and ideal for storing small parts safely.