Made in USSR
It is an agat has a chrome pattern made of durable metal.
It has a rare 30 second scale.
The 0.2-second division and the 30-minute counter with a 1-minute division.
It is a scaling of the 42mm, on the 15th and 15th century.
The control lever is taken with the lever. Start, stop and drop by successive depressions on the crown.
Permissible error for 30 min, s ± 1.0
Operating temperature range, ° С -20 ... + 40
Metal body, chrome plated