Omega · ref 165.024 · 1963–1971
Omega launched the Seamaster 300 in 1957, and the 165.024 is the version that defined it for most collectors. It arrived around 1963 with a bigger 42mm case, a 300m rating and twisted lyre lugs much like the Speedmaster of the day. Inside is the no-date cal. 552, a 24-jewel automatic, while US-market watches often carry the 17-jewel cal. 560. If you want a date, that's the sister reference 166.024. Over a run that lasted until 1971, Omega used four dials, four sets of hands and eleven bezels, starting with pencil hands and moving to swords. Britain's Ministry of Defence issued them to the Army and the Royal Navy, and Big Triangle dials with a large luminous triangle at 12 are the rare ones. These were working tools, and plenty had dials, crowns and bezels replaced at service, so an all-original example is uncommon.
Tritium lume. The radioactive lume that replaced radium on Swiss dials during the 1960s and stayed in use until the late 1990s. Its half-life is about 12 years, so a vintage tritium dial now glows faintly, if at all, and has often aged to cream or brown. Swiss dials often carry a T beside SWISS MADE, and Omega's 861 Speedmaster dials did until about 1994.
The caliber
The cal. 552 is a 24-jewel automatic at 19,800 vph with about 50 hours of reserve, and it also powered the two Seamaster 300 references that came just before this one. Watches sold in the US often carry the cal. 560, the same movement cut to 17 jewels because of import rules, and the date-equipped 166.024 runs the cal. 565 (or 563 in the US). A 17-jewel movement in a 165.024 isn't a warning sign on its own.
Water got into many of these through the early crown, which leaves a dull, oxidized rotor and damaged dials. The old bezel inserts crack, and service dials, sword hands and later screw-in crowns fitted during repairs are common.
Buying guide
We'd buy the 1966 Big Triangle 165.024 titled with its cal. 552, at $7,930 delivered from the US, near the bottom of the band despite the rare dial. There are about 23 for sale and most ask $7,525–12,675 delivered, while military-issue watches ask $11,900–15,300. This is one of the most faked and rebuilt Omegas, so match the 165.024 inside the caseback to a cal. 552 (or the 17-jewel 560 on a US watch), check the rotor for the dull tarnish of water damage, and make sure a military one has the broad arrow on the back. Check each seller's feedback and return policy on the item page, since eBay's watch search doesn't show them.
$5,500.00delivered
The lowest ask on a 165.024 at $5,500 delivered, about $2,000 under the band, titled 1966 with the cal. 552. It ships from Argentina, so budget for import duty and ask for movement, rotor and caseback photos before you offer.
VINTAGE OMEGA SEAMASTER 300 165.024 AUTOMATIC MOVEMENT CAL 552 41 MM From 66
$7,599.00delivered
Titled with the original cal. 552, about 1967, at $7,599 delivered, right at the bottom of the band. It ships from Argentina, so budget for import duty and ask for a photo of the rotor.
VINTAGE OMEGA SEAMASTER 300 165.024 ORIGINAL CAL 552 CIRCA 67
$7,930.00est. delivered
A Big Triangle dial, the rare one with a large lume triangle at 12, titled 1966 with its cal. 552 at $7,930 delivered. That's a low ask for the variant, so compare the triangle's lume with the hands in close dial photos.
1966 Omega Seamaster 300 No Date Ref. 165.024 Big Triangle Watch Cal. 552
Delivered prices include shipping as eBay quoted it to a US address on Oct 6, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 6, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$5,500.00delivered
$5,500.00 · free shipping
Buy It Now$5,500.00
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Good buy
Lowest ask, titled 1966 with cal. 552. Ships from Argentina.
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Used$7,599.00delivered
$7,599.00 · free shipping
Buy It Now$7,599.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled original cal. 552, about 1967. Ships from Argentina.
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Used$7,930.00est. delivered
$7,895.00 + $35.00 shipping
Buy It Now$7,895.00
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Good buy
Titled Big Triangle, 1966, cal. 552.
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Refurbished$7,000.00delivered
$7,000.00 · free shipping
Buy It Now$7,000.00
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Our take
Listed as seller refurbished. Ask what was replaced.
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Used$7,540.00est. delivered
$7,500.00 + $40.00 shipping
Buy It Now$7,500.00
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Our take
Sword hands in the title, the later style. Ships from Argentina.
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Used$9,506.07est. delivered
$9,500.00 + $6.07 shipping
Buy It Now$9,500.00
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Our take
Titled 1968 and in great condition.
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Used$11,873.45est. delivered
$11,838.45 + $35.00 shipping
Buy It Now$11,838.45
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Our take
Titled military, 1967. Check the caseback for the broad arrow. Ships from Japan.
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Used$23,466.42est. delivered
$23,431.42 + $35.00 shipping
Buy It Now$23,431.42
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Priced high
Big Triangle in the title, but about $10,800 over the band. Ships from Japan.
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Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 6, 2026.
See every listing on eBay ↗eBay searchA fresh strap, a set of spring bars and a spring-bar tool are the cheap part of making an old Omega Seamaster 300 165.024 wearable again. This searches Amazon for the usual kit.
Search straps & tools ↗Amazon search
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