802196 – 804121 = 1920 – 1925 861500 – 863488 = 1940 – 1945 804122 – 820750 = 1925 – 1930 863489 – 864997 = 1945 – 1950 820751 – 824822 = 1930 – 1935 865000 – 865892 = 1939 – 1945 824823 – 826999 = 1935 – 1940 865893 – 866208 = 1945 – 1950 871385 – 871499 = 1945 – 1950 882553 – 882620 = 1955 – 1960 871500 – 871646 = 1948 – 1955 882621 – 882723 = 1960 – 1965 871647 – 871726 = 1955 – 1960 891623 – 892126 = 1950 – 1955 871727 – 872850 = 1960 – 1966 892127 – 892567 = 1955 – 1960 892568 – 893310 = 1960 – 19 = 1970’s 1350000 = 19 = 19 = 19 = 1990’s.

Since 1987, Rolex has used a system of 1 letter, followed by 6 digits. Asce 41 pdf download. When buying and selling Rolex watches, that letter is one of the most important details.