I bought this windup #stopwatch at a vintage shop (Weavers Way Mercantile). It seems to work perfectly, aside from the one time the hands got stuck for reasons I wasn't able to replicate.
Strangely, while the minute hand is minutes as expected, the larger hand doesn't measure seconds, it counts hundredths of a minute. Does anyone know why you would want hundredths of a minute instead of seconds? I haven't been able to find a search term that turns up any info.
