This is an early production 6263, featuring the coveted sigma dial printed in silver. This exquisite example showcases early Mk. 1 pushers, and a bezel that remains in perfect condition. The serial number indicates its manufacture date being circa 1972.

The Swiss watch industry established standards and practices to distinguish high-quality timepieces, and the sigma symbol became a way to indicate that a dial had precious elements, and typically indicated a high standard of quality assurance.

This 6263 comes complete with its original tube and crown, further enhancing its authenticity and appeal. Accompanied by a matching band fitted with 271 end pieces, this watch is a truly original example. The combination of its historical significance, pristine condition, and iconic design makes this "sigma" 6263 a must-have for any serious watch collector.