The replica IW371418 copies the IWC Portugieser Chronograph, a 40.9 mm steel watch with two subdials, a slim bezel, and a clean dial. A good replica keeps that case size, runs a 7750-based automatic chronograph, and gets the subdial spacing right. Cheap copies miss the spacing, the date window, and the hand shapes, and those three things give a fake away on the wrist.

What Is the IW371418?

The IW371418 is one of the reference numbers inside the IWC Portugieser Chronograph family. That line has run for decades with a 40.9 mm steel case, a sapphire crystal, and a silver or white dial with two counters stacked at 12 and 6. It is a dress chronograph, so it sits thin under a shirt cuff and reads like a plain time-only watch from across a table.

Replica makers pick this reference because the design is simple. Fewer curves and fewer printed elements mean less to get wrong, and the movement is a well-known chronograph caliber that clone factories already build in volume.

Specs at a Glance

• Case: 40.9 mm stainless steel, about 12 mm thick
• Lug width: 20 mm, with curved lugs
• Crystal: sapphire on better copies, flat mineral glass on cheap ones
• Dial: silver or white, two subdials, applied numerals or batons
• Movement: automatic chronograph, 7750 base on high grades
• Strap: alligator-look leather, 20 mm at the lugs, 18 mm at the buckle
• Water resistance: splash proof on most copies, not rated for swimming

How to Judge a Replica IW371418 Before You Buy

Subdial spacing and shape

On the original, the two counters sit close to the center at 12 and 6, and the hands are thin leaf or baton shapes. A copy with fat hands, printed rings around the subdials, or counters pushed to the outer edge looks wrong at a glance. Ask for a straight-on photo, not an angled one.

Date window

The date sits in a small window, at 3 on most versions. Check the frame around it. Sharp corners and a white date wheel with black type match the original; an oversized window or a wheel with a different font does not.

Case lines and finishing

Look at the lug curve and the polish on the bezel. Good copies brush the case sides and polish the bezel, so light breaks in a clean line along the edge. Bad copies polish everything, which makes the case look thick and soft.

Movement and pushers

Press the pushers in a video before you pay. A 7750-based movement starts, stops, and resets with a firm click. A quartz copy ticks once per second and its chronograph hand jumps instead of sweeping.

Quartz or Automatic?

• Quartz: low cost, light on the wrist, keeps time to a few seconds a month, but the dead sweep and hollow pusher feel are easy to spot.
• Automatic 7750 base: correct sweep at 8 beats per second, real pusher feel, heavier case, needs a service now and then.
• Automatic with a decorated movement: adds engraved bridges and blued screws so a display back looks the part.

If you want the watch to feel like the real one on the wrist, pick automatic. If you want a cheap dress watch for one event, quartz does the job for a fraction of the price.

Flaws That Show Up on Low-Grade Copies

• Subdials spaced too far apart, leaving the middle of the dial empty
• A date window cut at the wrong spot or with a crooked frame
• Hands that are too thick, or painted instead of polished
• Mineral glass that adds a blue haze over the dial
• A strap with a stamped buckle and plastic-looking leather
• A case back with shallow, soft engraving

None of these flaws show in a blurry listing photo. Ask the seller for a 10 second clip of the chronograph running and a macro shot of the dial at 12.

Sizing and Fit

A 40.9 mm case with a 20 mm strap wears like a dress watch, so it suits wrists from about 6 inches to 7.5 inches without looking oversized. The curved lugs hug the wrist, which is why thin straps work better here than thick padded ones. On a wrist over 7.5 inches the watch starts to look small.

What Does a Replica IW371418 Cost?

Quartz copies sit in the low double digits. A good automatic copy with a 7750 base, sapphire glass, and a real leather strap lands in the low to mid hundreds. Price moves with the strap and the movement, not with the dial color.

Anything below that band with "automatic" in the listing title is often a quartz watch with a fake rotor glued on. Ask for a movement photo with the case back off before you commit.

Care and Service

• Wind a stopped automatic by hand 20 to 30 turns before you wear it.
• Keep the chronograph stopped when you are not timing anything, since running it drains the power reserve.
• Avoid water. A splash is fine, swimming is not.
• Wipe the case with a soft cloth and store the watch away from magnets and speakers.
• Expect a service or a movement swap every few years, which often costs less than a repair.

FAQ

Does the replica IW371418 have a working chronograph?

On automatic versions, yes. The pushers start, stop, and reset the central chrono hand and the two subdials. Quartz versions work too, but the hand ticks instead of sweeping.

What size is the replica IW371418?

Most copies use a 40.9 mm case with a 20 mm lug width, matching the original. Some budget versions come in at 42 mm, which throws off the proportions and makes the dial look larger than it should.

Can a replica IW371418 be repaired?

Yes, if it runs a 7750-based movement. Any watchmaker who services Valjoux-style chronographs can work on it, and replacement movements are easy to source. Quartz copies are usually swapped, not repaired.

Is it water resistant?

Treat it as splash proof only. The case back gasket on a replica is not pressure tested, so keep it away from pools, showers, and the ocean.

Which dial color is closest to the original?

Silver and white dials with applied steel or gold-tone markers match the reference best. Blue and black versions exist in the line as well, so pick one you can check against real photos before ordering.