Self Winding Clock Co Hairspring Mvmt
Bill Kapp collectionPhoto #: NH 52917

Navy Department, Washington, D.C.

Navy personnel at work in a communications office located in the Main Navy or Munitions Buildings, circa early 1919.
Note telegraph keys on tables, switching equipment in left background, and wall clock marked "Self Winding Clock Company".

U.S. Naval Historical Center Photograph.
I stole these last two pictures from an Ebay Auction  6501537375, Went for $860.
These last four pictures are of a 120 beat movement  for a two sided clock.  Note the aluminum thingy that holds the take off wheel on the front is homemade. The original was lost. I have no mechanical skills but I bet a brass one would look better.