The replica IW371618 v4 is the fourth revision of the steel IWC Portugieser Chronograph copy and the version most sellers stock today. It corrects the subdial spacing and case thickness that made earlier batches easy to spot. Treat "v4" as a factory batch label, not an official model name.
What does v4 mean on a replica IW371618?
Replica factories rework a case or dial and tag each pass with a higher number. V1 through V3 of this watch had three known faults: the 6 o'clock subdial sat too low, the date window had a sharp edge, and the case ran about 1mm thick. V4 is the run where those parts were retooled.
Numbers do not carry across sellers. One shop's v4 can be another shop's "new batch," so ask for the factory name and photos of the actual unit before you pay.
Replica IWC IW371618 V8: A Buyer's Checklist
How close is the v4 to the genuine watch?
The genuine ref. IW371618 uses a 41mm steel case, a silver-plated dial with blue leaf hands, and the in-house calibre 69355 with a column wheel and a 46-hour power reserve. A good v4 matches the outside numbers and hides a decorated Asian movement inside. On the wrist, size and dial balance do the talking.
- Case: 41mm diameter, about 13mm thick, brushed flanks with polished bevels
- Dial: silver-plated with circular azurage texture inside both subdials
- Layout: bicompax, running seconds at 6, 30-minute counter at 12, date at 3
- Crystal: domed sapphire with antireflective coating on both faces
- Water resistance: 3 bar on the real watch; treat any copy as splash-proof only
What should you check in seller photos?
Subdial spacing and dial print
On the real dial the two subdials sit close to the center and leave thin rings of silver around them. Early copies pushed them toward the outer edge. A v4 should hug the middle. Zoom in on the "IWC" and "Schaffhausen" print for sharp edges and even spacing.
Hands and numerals
Leaf hands should show a slight curve and a clean mirror polish, with no stamping marks on the flat. The applied Arabic numerals at 12 and 6 catch light along their bevels. Blue that turns purple in daylight means the plating is wrong.
Case profile and lugs
Ask for a side shot. Lugs should curve down from a thin mid-case, and the crown should sit against the case with no gap. A slab-sided profile points to an older case, whatever the listing says.
Case back and movement
The display back is where factories cut corners. V4 batches show Geneva stripes, blued screws, and an engraved rotor. Check that the rotor text sits centered and that the balance wheel is in the right place for a 69355 layout.
Which movement is inside a v4 copy?
Two builds show up. One uses a modified Asian 7750 with the small-seconds hand moved to 6 o'clock; the other uses a purpose-built clone of the 69355. The 7750 base is easier for a local watchmaker to service. The clone looks closer through the case back but is harder to repair, and a full swap often costs less than a repair.
What do the price tiers mean?
- Under $150: mineral glass, basic 7750, flat printed dial
- $250 to $400: sapphire crystal, closer dial texture, decorated movement
- Top of that range: the v4 from a known factory with a real photo set
A quote far above the rest of the market buys the same watch with a nicer story. Ask what factory made it and compare that answer across three sellers.
What are the red flags?
- Factory stock renders instead of photos of the actual watch
- No factory or version name in the listing
- "Swiss made 1:1" claims at a low price
- No short video of the chronograph start, stop, and reset
FAQ
Is the replica IW371618 v4 worth buying?
Pick it if you want the Portugieser look without the boutique price and you accept the limits of a copy. It is the most corrected run of this case so far. Skip it if you need real water resistance or factory service.
Does the v4 take aftermarket straps?
The case takes 20mm straps, so most aftermarket bands fit. Genuine IWC alligator costs more than the watch itself, which says a lot about where the money goes.
How do I tell a v4 from a v3 in photos?
Check the subdial gap, the date window edge, and the side profile. V4 moved the subdials toward the center, beveled the date aperture, and trimmed the case height.
Can a watchmaker service the movement?
Most will work on an Asian 7750 base. Clone movements with custom parts are harder to fix, so confirm the movement type before you buy.