The best fake IW371704 is a 1:1 grade replica with a 42mm steel case, correct 12-6-9 subdial geometry, double AR sapphire, and a working Valjoux 7750 chronograph that mirrors the layout of the genuine caliber 79320. Anything below that grade shows up as thin plating, a glued-on date wheel, or a quartz module behind a dial that should be mechanical.
Understanding Fake IW371704 Watches: A Comprehensive Guide
How do you judge a 1:1 IW371704 replica?
Case and crystal
The genuine 3717 case measures 42mm across and about 14.5mm thick, so a replica that reads 40mm or 44mm is wrong before you look at the dial. The bezel edge on the original is polished and thin, with a crisp step where it meets the brushed case band.
Sapphire with coating on both sides is a must at this price. Hold the watch at an angle: a good crystal goes dark and then clears, while a cheap one keeps a blue or purple glare.
The original hides a soft-iron cage behind the dial for magnetic protection. No replica carries one, so a case back with different engraving is a normal trade-off, not a defect you can fix.
Dial, hands, and subdials
The three subdials sit at 12, 6, and 9, and the day-date window sits at 3. Put a photo of the genuine next to a photo of the replica and compare the printed minute track: weak builds drift on font weight and numeral spacing.
Hands should be matte white with clean lume fill and no paint bleed at the edges. The date and day discs must center in the window, since a disc that sits high or low is the fastest visual tell.
The chronograph movement
Because the real watch uses a 7750 base, a replica A7750 keeps the same subdial positions with no fake gearing. Push the top pusher: the 12 o'clock hand should sweep, and the 6 o'clock counter should advance after the minute hand passes 12.
Reset must snap back to zero in one firm click. A hand that drifts off zero after reset points to a worn reset hammer or a build with no quality check.
Bracelet, clasp, and end links
Solid links, tight end links, and a firm clasp are the parts you feel every day. Gaps at the lug line and a rattle at the clasp matter more than the engraving depth on the case back.
What separates the top tier from the mid tier?
- Movement: decorated A7750 with a working chronograph vs. a faux subdial or a quartz swap
- Crystal: double AR sapphire vs. single-side coating or mineral glass
- Dial: applied markers with matched lume vs. printed markers
- Case finish: brushed band with polished bevels vs. uniform satin
- Bracelet: solid end links vs. folded steel
What do the replica tiers cost?
Expect three bands. Entry copies run under $150 and use quartz or a low-grade 7750. Mid tier sits near $250 to $400 with a working chronograph and a decent dial.
Top 1:1 builds land between $450 and $700. That is the band worth comparing side by side with photos of the genuine, because the extra money buys better lume, a cleaner dial print, and tighter bracelet fit.
Which red flags should make you walk away?
- Subdials at 3-6-9 instead of 12-6-9 (wrong layout for this reference)
- A seconds hand that ticks once per second (quartz inside)
- Day-date window with no day disc, only a printed date
- Photos that hide the case back or the clasp
- Sellers who cannot send a video of the chronograph running
Before you order: a five-point check
- Ask for a timestamped video of chronograph start, stop, and reset.
- Compare the subdial positions to a photo of the genuine reference.
- Confirm the crystal has coating on both sides.
- Check for solid end links and a clasp with micro-adjust.
- Confirm the return policy covers a misaligned date wheel or a dead chronograph.
Frequently asked questions
Is a fake IW371704 safe to wear in water?
No. Rated depth on a replica means little without tested gaskets. Take it off for swimming and showers, and have a watchmaker pressure test it if you plan to wear it in rain.
How much should the best IW371704 replica cost?
Top builds land between $450 and $700. Below $200 you are buying a quartz watch or a chronograph that will fail, and above $900 you are paying for a name rather than better parts.
Does the replica chronograph work like the original?
On a 7750-based build, yes: minutes at 12, hours at 6, running seconds at 9, and a day-date at 3. Ask for a video showing start, stop, and reset before you pay.
Can a watchmaker tell it is a replica?
Yes, from the case back, the movement finish, and the bracelet stamping. A replica copies what you see on the wrist, not what a jeweler sees under a loupe.
Which wrist size suits the 42mm 3717 case?
The 42mm case with short lugs wears closer to a 40mm watch, so wrists from 6.5 to 7.5 inches fit with the bracelet sized down. Wrists under 6.25 inches may find the 14.5mm thickness top-heavy.