1972 Omega Seamaster 120 (Ref. 166.073) “Deep Blue”

There is something about the early vintage Omega Seamaster that truly embodies the golden era of dive watches of the 1960s-1970s. Omega has a long history and heritage in dive watches dating back to the 1930s. The seahorse-adorned case back of the Seamaster series pays tribute to Neptune, the Roman god of the sea. The seahorse logo was conceived by engraver Jean-Pierre Borle. He was inspired by an image of Neptune driving a chariot pulled by seahorses, which is why the Omega seahorses are depicted wearing bridles.

The "Deep Blue" Omega Seamaster 120 ref. 166.073 is a stunning timepiece that is both functional and stylish. Its combination of beauty, history, and performance makes it a true collector's item, and a watch that you can be proud to wear for years to come. The defining difference between the Omega Seamaster Deep Blue from other dive watches of the era is execution, with an overall design that feels very familiar but with an aesthetic that outclasses its counterparts. As it was only produced for 4 years, from 1970 to 1974, the Deep Blue is certainly an uncommon timepiece and one of the most sought-after sports watches among Omega collectors.

Stock # OMSM120DB-2
Brand Omega
Style Seamaster 120
Model 166.073
Serial 34XXXXXX
Size Men's
Material Stainless Steel
Dial Blue
Millimeters 42.5
Bracelet Omega 1170 Bracelet W/ 634 End Pieces


The large and noble case features extremely broad straight lugs with rounded finishing that gives the watch a very robust appearance. The lightly polished case remains in wonderful vintage condition, showing gentle signs of use. The original blue bakelite bezel exhibits some general wear and delamination but no actual cracks. The case retains its larger Omega-signed screw-down crown, which also operates the quick-set date function by pulling the crown out to the last position. The case back features the Seamaster medallion in fully present condition. The Omega 1170 bracelet with 634 end pieces retains 20 links that show light stretch and will fit up to a 7 1/2-inch wrist.


The original glossy blue dial is vibrant and features a charming vintage aesthetic with a subtle bubble patina present that is only visible under certain lighting conditions. Apart from the dial patina, the dial doesn't feature any notable elements of damage. The tritium lume plots have achieved a lovely golden-yellow patina and exhibit no apparent degradation when inspected under UV light. The original tritium sword-style hands have aged to a slightly more green color-hue which is common in this era, under UV light inspection the hands display no degradation.


None. The watch is keeping time perfectly, but the service history is unknown. A movement service can be provided upon request.

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