Extra Power
Generally speaking a mainspring barrel will perform about 6 rotations during its autonomy (the time it takes to transition from a fully wound state to… Read More »Extra Power
extra
Vintage Military Models – Cortebert “Extra” Pocket Watch
This Cortebert “Extra” pocket watch, designated as a General Service Timepiece, is housed in a soft alloy screw-back case; this example is marked on the… Read More »Vintage Military Models – Cortebert “Extra” Pocket Watch