Short answer
V10 is a seller version tag, not a factory specification. It marks a catalogued revision of a replica of the IWC Portuguese Hand-Wound reference IW545188. Each revision collects fixes to dial print, hand shape, case profile, crown size and movement finish. Two sellers can list a v10 and ship different watches. Ask for the build sheet before you compare prices.
The reference it copies
IW545188 sits in the IWC Portuguese Hand-Wound line. The original uses a 44 mm steel case, sapphire crystal, display back, small seconds at 6 o'clock and no date. The movement is hand-wound. The strap is leather on a steel buckle or folding clasp, depending on the variant.
What a v10 revision changes
- Dial: applied numerals and markers, thinner print, corrected spacing between the sub-dial and the Swiss Made text.
- Case: lug profile, crown diameter, the step between polished and brushed surfaces.
- Hands: leaf shape, blued finish, sub-dial hand length.
- Movement: bridge decoration and engraved markings that sit closer to the original layout.
Checks before payment
- Case: 44 mm across. Ask for caliper photos. A 6498 build often measures 0.5 mm to 1.5 mm thicker than the original 10 mm.
- Sub-dial position: seconds at 6 needs a 6498-type movement. A 6497 puts the sub-dial at 9. Wrong position, reject the watch.
- Beat rate: 18,000 vph. Ask for a timegrapher photo. Rate inside plus or minus 10 seconds a day, amplitude 250 to 300 degrees.
- Dial print: letter height, spacing, no blur under a loupe. Compare the sub-dial ring depth against a straight-on photo of the original.
- Hands: colour in daylight photos. Studio light hides purple paint on a blue hand.
- Caseback: engraving depth, sapphire fit, screw slots that line up.
- Terms: a written return window of 7 days or more, and QC photos of the exact unit, not a stock image.
Where replicas stop
- Water resistance: no replica carries a tested rating. ISO 22810 testing is not done. Do not swim or shower in it.
- Movement: a 6498 clone, not an IWC calibre. A decorated plate does not change the base.
- Swiss Made: the dial print does not meet the criteria published by the Federation of the Swiss Watch Industry.
- Service: parts come from the seller, not from a watchmaker parts account.
- Resale: no collector market. The value is what the next buyer pays for a used replica.
Price
Most v10 hand-wound Portuguese listings ask a few hundred US dollars. Get the figure, the currency and the shipping cost in writing. Add the cost of regulation, since a hand-wound clone can arrive running 30 seconds a day off.
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