OMEGA Seamaster 300, 3rd Big Triangle, 40mm, Automatic Calibre 552, 165.024-64

The Omega Seamaster 300 “Big Triangle” 165.024-64 takes its nickname from the oversized triangular marker at 12 o’clock. It stands out against the black dial, while the broad rotating bezel and twisted lugs give the 40mm stainless steel case its distinctive profile. This example is fitted with an aftermarket leather strap.

The Omega Calibre 552 is a self-winding mechanical movement with central seconds and no date. The uninterrupted dial lets the proportions of the markers do the work, with the large triangle clearly distinguishing 12 o’clock from the other hours.

Specifications

• Brand: Omega
• Model: Seamaster 300 “Big Triangle”
• Reference: 165.024-64
• Movement: Omega Calibre 552 automatic
• Case Material: Stainless steel
• Dial: Black with oversized triangular marker at 12 o’clock
• Case Size: 40mm
• Crystal: Acrylic
• Caseback: Solid stainless steel
• Bracelet / Strap: Aftermarket leather strap
• Wrist Size: 17.5cm - 20.5cm / 6.88'' - 8.07''
• Water Resistance: 300m – not guaranteed due to age
• Production Period / Year: Circa 1967 (Big Triangle model era)
• Functions: Hours, minutes and central seconds
• Accessories: None
• Condition: A few traces of usage, some scratches can be seen but overall, in very good condition
• Availability: Global Concierge Sourcing Service

Key Features

• Calibre 552 automatic movement — Omega’s self-winding movement keeps the display to hours, minutes and seconds, preserving the clean no-date layout.
• Big Triangle dial — The oversized marker at 12 o’clock gives this version of the Seamaster 300 its unmistakable dial layout.
• 40mm case — The broad bezel gives the watch presence, while the twisted lugs draw the case neatly into the strap.
• Acrylic crystal — The curved edge softens the view of the dial at an angle, a detail characteristic of vintage dive watches.
• Rotating dive bezel — The wide, numbered scale frames the dial and gives the 165.024 much of its visual character.

This vintage Seamaster 300 suits someone drawn to Omega’s early dive-watch designs. The Big Triangle dial is the standout detail, and the leather strap gives this example a more relaxed look on the wrist.

Style is Timeless