The replica Portofino Moon Phase 35 is a 35 mm dress watch copy modeled on IWC's Portofino line, built around a moon phase aperture at 12 o'clock and a slim leather-strap case. It is a third-party watch and not an IWC product, so the case size, movement, and materials vary from listing to listing. This guide covers what the "35" means, how the complication actually works, and which details are worth checking before you order one.
What the "35" in the Name Means
In replica listings, the number after the model name is almost always the case diameter in millimeters. IWC publishes its Portofino Automatic Moon Phase with a 37 mm case, so a seller quoting 35 mm is describing a slightly smaller copy aimed at narrow wrists and classic proportions. Confirm the measurement in the spec table rather than the product title, because some listings mix 34, 35, and 37 mm sizes under the same name.
Case Size and Wrist Fit
A 35 mm dress watch can wear larger than the number suggests when the lugs are long and the dial is bright. Three measurements decide the fit:
- Case diameter: 35 mm measured across the 3 to 9 o'clock edge, excluding the crown.
- Lug width: commonly 18 mm on a case this size, which controls how many aftermarket straps will fit.
- Lug-to-lug: the total span over the wrist. Anything near 42 mm starts to look oversized on a small wrist.
Measure your wrist in millimeters and compare that figure against the lug-to-lug number, not the diameter alone.
How the Moon Phase Complication Works
A true moon phase display tracks the 29.53-day synodic month with a geared disc, so the moon drifts out of alignment slowly instead of every day. Some budget copies skip that mechanism and use a 24-hour disc printed with a moon and stars, which rotates once a day and reads correctly only at certain hours. Ask the seller directly: is the disc driven by an hour wheel or by a moon phase gear train? A quartz moon phase is usually the 24-hour type. An automatic with a dedicated moon phase module costs more but behaves like the watch it copies.
Dial Details Worth Checking
- Roman numerals: crisp edges, even thickness, and no smudged black printing.
- Leaf-shaped hands: slim, pointed, and aligned with the printed minute track.
- Moon aperture: a clean cut at 12 o'clock with no rough inner edge or paint bleeding onto the dial.
- Date window: square or rounded, with legible type and a disc that centers properly.
- Dial finish: flat and even. Wavy or cloudy lacquer points to a cheap base.
Case, Crystal, and Strap
Stainless steel is standard, but the finishing matters more than the alloy. Look for a polished bezel paired with a satin-brushed case band, sharp lug edges, and a case back that sits flush. Sapphire crystal resists scratches and usually carries an anti-reflective coating; mineral glass scratches and looks dull within months. On the strap, genuine leather breaks in and darkens with wear, while synthetic leather cracks at the spring bars. If the listing does not state the crystal type, assume mineral.
Water Resistance and Daily Wear
Most replicas of this style are rated for splash resistance only, and that rating is rarely tested. Crown gaskets on budget copies are often dry or missing. Treat the watch as rain-safe at best and keep it away from showers, pools, and dishwater.
Pre-Purchase Checklist
- Confirm the case diameter in millimeters, not the model number.
- Ask which movement drives the moon phase disc.
- Check the stated lug width so you can fit replacement straps.
- Request real photos of the dial, case back, and crown.
- Confirm the crystal material.
- Read the return policy before paying.
Choose the version that matches your wrist and your expectations for the complication. A replica Portofino Moon Phase 35 with a real moon phase gear train, sapphire crystal, and a clean dial will look and wear far better than a cheaper copy running a rotating 24-hour disc.