In this first installment of a restoration series on the Elgin A-8 “Jitterbug” WWII Navigation Timer, the host provides a detailed look at this high-precision military stopwatch. Named for its exceptionally high oscillation rate of 108,000 vibrations per hour (VPH)—nearly four times that of a standard modern high-beat wristwatch—the A-8 was designed for critical timing tasks requiring sub-second accuracy. The video walks through the initial inspection and disassembly of the 10-second timer, revealing its unique pillar-wheel architecture and the high-speed movement of its balance wheel. The host demonstrates the “start, stop, reset” single-button pusher mechanism and carefully de-cases the movement, removing the dial and chronograph works to prepare the 80-year-old brass components for a thorough cleaning.
