The short version. Bracelets pair by reference + endlink number: 1039/516 for the pre-moon years, 1171/633 as the long-lived standard from 1970, 1479/812 for the '90s 3570.50. Straight-lug vintage refs are 19mm; everything asymmetric from the 105.012 onward is 20mm. And "correct" means period-correct — in the '60s and '70s the dealer fitted the bracelet at point of sale, so "original to the watch" is usually unprovable.

Bracelet by reference

Reference (era)Bracelet / endlinksLugs
CK2915 / CK2998 (1957–62)7077 / 7912 (flat-link, partial expansion); endlinks 6, 7, 1619mm
105.002 / 105.003 (1962–65)1035 / 7912; 506 endlinks (19mm)19mm
105.012, 145.012, 145.022-68/-69 (1963–71)1039 / 516 — the pre-moon flat link; last batch stamped 4/7120mm
145.022-68 → -711116 / 575 — the overlooked flat link, similar in feel to the '90s 147920mm
145.022-69 → late '70s1171 / 633 — the long-lived standard, in production from 1970 to today20mm
145.022-69 SW, -71, early '80s1175 / 640 (later 47) — square links, no spring links; the '60s look20mm
145.022 ('80s)1171/1 / 633 — pin (not screw) construction; also the service replacement20mm
145.022 / 3590.50 ('80s–early '90s)1450 / 808 — rounded links, H endlinks; many call it the definitive Speedmaster bracelet20mm
3570.50 / 3590.50 ('90s)1479 / 812 — solid links, thin polished inners; discontinued, no longer sold by boutiques20mm
Late '90s–2010s1498/840, 1499/842, 1998/840 or 849 — mixed-strand construction era20mm
311.30 (1996–2020)1958/957 — screw links20mm
3861 (2021+)New five-link bracelet, 20mm at the lugs tapering to 15mm at the updated buckle20mm

How to spot an original

What correctness is worth

Three myths, retired. One: "My 1969 Speedmaster must wear a 1039" — 1039, 1116, 1171, and 1175 are all documented on 145.022-68/-69/-71; dealers fitted what they had. Two: "Any 1171 is vintage" — the 1171 is still in production; a laser-etched (32) 1171/633 is a modern replacement worth far less than a stamped first-generation (11) trapezoid-logo example. Three: "The bracelet date must predate the watch" — last-batch 1039s (4/71) shipped on watches produced earlier in 1971; a bracelet date slightly after movement production is normal.

And a smile: NASA issued its Moonwatches on black leather, then black Velcro — but off duty, the astronauts wore JB Champion steel-mesh bracelets. A mesh-bracelet Speedmaster is historically legitimate.

Where collectors buy