Short answer
The v4 tag is a seller batch label, not an official version number. On a fake Speedmaster Reduced listed at 38mm, judge the actual watch in photos and ask which movement is inside. The biggest tells are case thickness, subdial spacing, bezel font, and how the chronograph pushers feel. A good v4 can look close on a wrist. A bad one falls apart under a loupe and in the hand.
Fake Speedmaster Reduced 38mm v10: What to Check Before You Buy
Why 38mm needs a tape measure
Genuine Speedmaster Reduced references are usually quoted around 39mm, though owners measure differently depending on whether they include the crown guards or bezel. Replica listings often round down to 38mm because it sounds closer to the original Reduced proportions. I would ask for caliper photos across the case at 3 and 9, not just a ruler next to the dial. A 1mm difference is not fatal, but a thick case is. The Reduced is a slim watch for a chronograph. If the replica looks tall in side profile, it will sit worse than the number suggests.
Dial and subdial checks
Look at the subdial spacing first. On a modular chronograph, the subdials can sit too close to the center or too far out. Compare the replica photo to a straight-on photo of the reference. Check the date window if the model has one. The cut should be clean, and the font should match the era. Bezel insert font is another common weak point. Look at the dot over 90, the spacing of the tachymeter numbers, and whether the print looks flat or raised. Hands should be the right length. Short subdial hands and thick tips show up in lower batches.
Movement and pusher feel
The genuine Reduced uses a modular automatic, which is part of why the case is thin. Many replicas use a quartz chronograph or a modified automatic. Neither is automatically bad, but they feel different. A quartz chrono snaps back to zero with a hard click. An automatic with a module can feel softer and can have a slight lag. Ask the seller to show a video of the chronograph start, stop, and reset. Listen for rotor noise. Check that the subdials do what they should. A 24-hour subdial that is just a fake wheel is a tell on the wrist because it never moves.
Fake Speedmaster Reduced 38mm v7: What to Check Before You Buy
Case, bracelet, and finishing
Check the lugs and the crown guards. The Reduced has a specific case shape that is not just a shrunken Moonwatch. Look at the pusher shape, the crown logo, and the bezel edge. On the bracelet, check end link fit and clasp stamping. Sharp edges on the underside of the lugs are common on cheaper batches. Brushing should be fine and even, not coarse. The caseback engraving should be crisp. A v4 label does not guarantee any of this. The same batch can vary by example.
Questions to ask before buying
- Can you send photos of the actual watch, not stock images?
- What is the measured case thickness and lug width?
- Which movement is inside, and does the chronograph reset cleanly?
- Is the date window aligned, and does it change at midnight?
- What is the return policy if the watch arrives with a misaligned bezel insert?
Bottom line
A fake Speedmaster Reduced 38mm v4 can be a decent stand-in if the case is slim, the dial layout is close, and the chronograph works. Treat the version number as a starting point. The photos and the movement matter more. Buy the example, not the label.