Short answer
Four checks catch most fake Omega Speedmaster Date watches: the caseback engraving, the calibre 1164 movement, the subdial layout, and the serial number. The Speedmaster Date is a 40 mm automatic chronograph with a date at 3 o'clock. Omega sold it from the 1990s to the 2010s. It is not the Moonwatch. Fakes copy the case shape and the dial print. Most stop there.
Caseback and reference number
Start with the reference. Ref. 3210.50.00 is a steel Speedmaster Date with a black dial, a 40 mm case, and a steel bracelet. The caseback holds the reference, the serial, and the Ω mark. Real engraving has sharp edges and even depth. Fake engraving looks shallow, with letter spacing that drifts. Compare the word Speedmaster letter by letter. Check the center: brushed inside a polished ring on real watches, all polished on many fakes.
Movement: calibre 1164
The Speedmaster Date uses calibre 1164, an automatic chronograph built on a Valjoux 7750 base. Specs: 25 jewels, 28,800 vibrations per hour, about 44 hours of power reserve. The balance beats 8 times per second. A 21,600 vph clone beats 6 times per second and sounds slower. Fakes use a hand-wound Seagull ST19, a Chinese 7750 copy, or quartz. Check the date change: on calibre 1164 the date sits at 3 o'clock and sets with the crown. A quartz fake has a ticking second hand. A 7750 copy can pass a photo test, so ask for a video with the movement running.
Dial and subdials
Subdials sit at 12, 6, and 9. Running seconds at 9, 30-minute counter at 12, 12-hour counter at 6. The date window sits at 3. Fake dials show wide date cuts, thin fonts, and subdial hands that sit too low. The applied Ω logo should have a flat top and round feet. Lume on hands and hour markers is Super-LumiNova and glows green. Fakes glow blue or not at all.
Speedmaster Date Replica Omega: The Ultimate Guide
Case, crown, pushers
The case measures 40 mm across, without the crown. The crown carries the Ω mark. Pushers are pump style. On fakes the crown is small, the pushers sit high, and the case lines are soft. Check the crystal: sapphire with an inner anti-reflective coat. A real crystal shows a faint blue or purple tint at an angle. Mineral glass on a fake shows none.
Serial and paperwork
The serial has 8 digits. It appears on the caseback and on the movement bridge. Ask for photos of both. Duplicate serials show up on fake batches. Search the number before you pay. Papers: warranty card, pictograms card, and a card with the reference and serial. The numbers must match. A missing card is a price factor, not proof of a fake.
Checklist
- 40 mm case, date at 3 o'clock
- Calibre 1164, 28,800 vph, 25 jewels
- Subdials at 12, 6, and 9
- Sharp caseback engraving
- 8-digit serial matches caseback and movement