Devoid of any battery, any motor, these Timers are mostly used to activate Landmine devices & are designed to evade detection by any metal detector when buried deep inside.  Give activation signals at 30 & 60 minutes & are rugged enough to function normally in -40 degree Celsius to 60 degree Celsius.

Fully assembled mechanical plastic timer device with visible red actuator components, mounted on a black background.

Disassembled parts of a mechanical plastic timer laid out on a red surface, including white plastic housing, gears, and red actuator components.