This thing is 12.06 long with a 8.28 half length. It has a 2.74 balance seat and a 2.02 HS seat. The roller table is 1.25. All measurements are metric.
Got any ideas as to what it fits? My books don't go that high. It has the same length as the diameter of a dime.

Could be from a car clock or travel clock, 37s.
It does look BIG.

Steve