This beautiful Seamaster chronograph is one of a few variants known. This particular example exhibits the rarer "albino" white radial sub dials with matching colour matte outer 'Tachymetre' scale and central red second chrono-hand, as used in the Omega Chronostop, and Ultraman Speedmaster in 1967.
 
The movement is a caliber 321, which dates to 1966. The c-shape case is in nice unpolished condition, overall good with only hairline scratches, and the correct style raised dome plexiglass.
 
This 145.006-66 is one of the hardest variants to find with original dial in good condition because many of these were water damaged or just worn out. The silver sunburst finish on this one is impeccable. The crown is a later service replacement.