Fine and rare Gruen “Jump Hour” Doctor's Watch, stainless steel/pink gold rectangular Doctor's Watch, circa 1930’s.  

A very rare model with a jumping hour, showing the hour through a window instead of the usual hand indicator.

D: Original two tone dial with aperture for the red jumping hours and large seconds chapter.

Original hands set.

C: Very good condition original rectangular case with applied pink gold decoration at the sides of the case.

M: Original GRUEN signed 17 jewel movement. The same source that supplied identical movements to Rolex during this period.