Hamilton Rare K-475 Automatic Calendar

Hamilton Rare K-475 Automatic Calendar, circa 1960 Case: 10k yellow gold filled, uni-body, 41 mm x 34 mm, extended lugs with honey comb engraving, off set crown between 4 and 5 o'clockDial: black with gold outer border and central gold cross hatched arm, applied gold triangle indexes with small luminous plots, date aperture at three, gold Dauphine handsMovement: caliber 690, automatic, 17 jewels, monometallic balance, shock absorber.  Orignal, unserviced.

The Automatic K-475 is considered to be the holy grail of collectible asymmetric mechanical watches produced in the 1960's by Hamilton. The estimated total production is only 1300 pieces. The eccentric design is most likely based on early drawings of Richard Arbib. The cross hatched motif of the lugs being similar to the Vega design and the off-set centering of the case similar to the Regulus and Victor models.