Short answer
The "5th generation" tag comes from sellers, not from Omega. Omega does not number Speedmaster replicas in generations. The label marks the newest build of a 1957-style Speedmaster copy. The watch it copies is the CK2915, the first Speedmaster, released in 1957. Case size is about 39 mm. The movement in the original is the Caliber 321.
Speedmaster 1957 5th Generation Replica Availability: A Buyer's Guide
The 1957 reference
The CK2915 was the first Speedmaster. Omega released it in 1957 as a racing chronograph. It has a steel bezel with a tachymeter scale, three sub-dials, and a hand-wind movement. The "Broad Arrow" name comes from the hour hand shape. Omega made three sub-references: CK2915-1, -2, and -3. Total production is not published. A CK2915-1 sold at Phillips in Geneva in November 2021 for CHF 3,115,000.
speedmaster 1957 5th generation replica comparison
What "5th generation" means in the replica market
Factories and dealers reuse mold sets and swap parts. When the dial print, the bezel insert, or the case profile changes, dealers rename the build. There is no registry and no standard numbering. A 5th generation from one seller is not the same watch as a 5th generation from another. Ask for photos of the exact unit.
speedmaster 1957 5th generation watch replica
Parts to check
- Case: about 39 mm across, no crown guards, thin lugs.
- Dial: three counters. Check sub-dial spacing and printing thickness.
- Hands: broad arrow hour hand, leaf minute hand, straight chronograph hand.
- Bezel: steel tachymeter insert, base 500 scale.
- Crystal: acrylic on the original. Most copies use acrylic.
- Caseback: engraved text depth varies by batch.
Movements
Most 1957-style copies run a Seagull ST19 hand-wind chronograph. The ST19 uses a column wheel, runs at 21,600 vph, and holds about 40 hours of reserve. Some higher-priced builds use a copy of the 321 layout. The 321 has a column wheel and a horizontal clutch. Omega switched from the 321 to the 861 in 1968. The 1861 replaced the 861 in 1997. The 3861 replaced the 1861 in 2021. Genuine Omega movements do not appear in replicas at these prices.
speedmaster 1957 5th generation replica vs original
What is not known
Batch sizes are not published. Water resistance claims from sellers cannot be checked without a pressure test. Weight and thickness differ between batches. Caseback serial numbering is not standard across sellers.
Before you buy
- Ask for the case diameter in millimeters.
- Ask for a photo of the movement.
- Ask for a timing reading in seconds per day.
- Get the return window in writing.