Dual-dial: presence of an additional numbering (13 to 24) Small seconds hand: presence of the seconds sub-dial Year of manufacture: 1951 • Post-World War II period. Movement: Serial number in this range, powered by a manual wind mechanical movement of a famous caliber. Historical value: In 1951, Omega was celebrating a few years after the launch of the "Seamaster" model and was gradually transitioning from traditional pocket watches to wristwatches, making pocket watches from that period distinctive pieces that combine the heritage of the past with the advanced technologies of the 1950s. The watch is now approximately over 75 years old. Material: Stainless Steel Watch Size: 48mm Movement Type: Manual Features: Water Resistant Brand: Omega