Rolex Prince in an ultra-rare platinum straight sided case, circa 1935. It contains the Observatory quality "extra prima" 17 jewel movement which was "offically tested in 8 ways". Due to high import taxes, many Rolex movements were imported to Japan without cases. This case is original to the watch and was made in Japan by the Yoshida company, on contract from Rolex. (See attached page from the 1932 Yoshida catalog showing a Prince and other Rolex models.)
When introduced in 1930, the platinum model was priced to be very exclusive, selling in Europe for over three times what an 18k white and yellow gold model would cost. Hence, they are seldom encountered today. Dimensions: 36 x 20 MM.
