1911 Model 974L
1918 Model 910
1919 Model 975
1920 Model 972
1920 Model 974
1920 Model 992 Railroad
1921 Model 956
1923 Model 914
1925 Model 922 Masterpiece
1925 Model 996
1918 Model 910
1919 Model 975
1920 Model 972
1920 Model 974
1920 Model 992 Railroad
1921 Model 956
1923 Model 914
1925 Model 922 Masterpiece
1925 Model 996
1926 Model 902
1926 Model 916
1929 Model 918
1933 Model 912
1934 Model 400
1934 Model 950
1937 Model 917 Conversion
1941 Model 4992B US Navy Navigation watch
1941 Model 2974B US Navy Comparing Watch
1942 Model 22 Marine Chronometer
1948 Model 992B Railroad
1949 Model 921
1951 Model 950B
1955 Model 945 Conversion
1955 Model 669
1926 Model 916
1929 Model 918
1933 Model 912
1934 Model 400
1934 Model 950
1937 Model 917 Conversion
1941 Model 4992B US Navy Navigation watch
1941 Model 2974B US Navy Comparing Watch
1942 Model 22 Marine Chronometer
1948 Model 992B Railroad
1949 Model 921
1951 Model 950B
1955 Model 945 Conversion
1955 Model 669
There are so many versions of model 23, how does a collector know which one to acquire?
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