Introduced in 1937, the Patek Philippe ref. 533 is one of the earliest pure chronograph references released in series sharing strong similarities with the ref. 130. While most components of the reference are almost identical to the ref. 130 including the case dimension at 33mm, dial configurations and caliber 13-130, the most distinctive element that sets the both apart is its rather thick flat coin shaped bezel.

Ref Variations: 533R, 533J,