Explanatory notes
β¦ direct from the lathe or roughly cut to shape, without drilling, hollowing, etc.). These are classified according β¦ (cock), escapement, setting wheel, etc.). (2)Β Β Driving mechanism Β : mainspring, barrel, barrel cover, β¦ larger. Parts peculiar to clock movements include weight drums, pendulums, including compensated pendulums (mercury, β¦