This looks like the start for the engine, or it could be one of the
many motors to power one of the doors, getting a final touch-up.
The work of restoring and sometimes manufacturing of small parts is
very time-consuming. The workshop area with the buffers, grinders,
drill press and other small equipment gets crowded from time to
time.
Numerous small pieces were sometimes hand made.
Small manufactured pieces are delivered and await installation.