1st ed 1913 (curved sides); 2nd ed 1913/1918; wartime brass-strip column variant; rare ebonized black finish recorded. Ebonized black 1st-edition variant: not one of the four traditional oak finishes advertised in the 1913/1918 catalogues; mottled white paint over black columns, presumed factory-applied. An example is owned by the Canadian Clock Museum; dial and movement marked ‘Berlin’ (manufacture 1916 or earlier).