If you are shopping for a fake IW371748, you are looking at a replica of the IWC Portuguese Chronograph — a 41 mm stainless steel chronograph prized for its clean, balanced dial and slim bezel. This guide walks through what the reference is, what the better replica builds get right, and what to verify before you place an order.
Key Features
- 41 mm polished stainless steel case with a slim, vintage-style bezel
- Two-register chronograph layout: running seconds at 6 o'clock, 30-minute counter at 12
- Applied Arabic numerals, leaf-shaped hands, and a fine rail-style minute track
- Domed sapphire crystal with an anti-reflective coating
- Automatic chronograph movement with a power reserve in the 40-hour range
- Alligator-grain leather strap with a signed deployant clasp
- Solid or display caseback, depending on the specific build
- Everyday water resistance for hand washing and light rain
Materials and specifications
The case is the first thing to check on any replica of this reference. Better builds use 316L stainless steel with a brushed case band and a polished bezel, and they keep the proportions close to the genuine 41 mm width and roughly 13 mm thickness. Crystal quality matters just as much: a domed sapphire with proper anti-reflective treatment keeps the dial readable at an angle, and the dial itself should show crisp printed text, evenly applied numerals, and subdials that sit flush rather than sunken. On the movement side, most replicas run an automatic chronograph caliber with a smooth sweeping seconds hand and pushers that start, stop, and reset cleanly. Expect a leather strap with alligator-style embossing and a functional deployant clasp; swapping in a higher-grade strap is the simplest upgrade.
Shipping and returns
Orders are typically dispatched within a few business days and shipped in discreet, protective packaging with tracking. Inspect the watch as soon as it arrives — case, crystal, chronograph function, and strap — and contact support within the stated return window if anything is off. Most sellers cover defects such as a non-running movement or a damaged crystal, so keep the packaging until you have confirmed everything works.
What is the IW371748?
It is the reference number for the IWC Portuguese Chronograph, a classic two-register chronograph with a 41 mm case and one of the most imitated dial layouts in watchmaking. Its simple, legible design is exactly why replicas of it are so common.
How close is a replica to the original?
Externally, a good replica can look very close in photos — correct case size, dial printing, and hand shape. Up close, differences usually show in movement finishing, crown feel, and the depth of the dial text.
What should I check before ordering?
Confirm the listed case diameter, crystal material, movement type, and strap option, and ask for real photos or a video of the actual watch rather than catalog images. A quick question about the return policy before checkout saves trouble later.