Answer first: the most reliable way to verify an IW329068 is a two part check, the caseback markings matched against IWC's published reference data, plus an inspection of the movement and case interior by a watchmaker who services the brand. Photo comparison comes last, because modern replicas photograph well. The criteria below rank each check by how hard it is to fake: reference and serial engraving, case and dial finishing, movement architecture, documentation, and seller behavior. Each section covers what a genuine example should show and what a fake shows instead.

Why the IW329068 Reference Gets Faked

The IW329068 sits inside the wider IW3290 group, and references that share a number prefix tend to share case proportions, crystal shape, and dial furniture. Replica makers exploit that overlap. One case mold and one dial print run can cover several listings, so buyers who search by reference number alone end up comparing a replica of a different variant against photos of the real watch. That mismatch, more than any single finishing flaw, is the most common reason people misjudge a watch.

Volume matters too. Any reference that sells in decent numbers, wears comfortably, and moves easily on the secondary market will attract counterfeiters. Popularity drives the supply, not complexity.

Criterion 1: Caseback Engravings and Reference Numbers

Start here because this check is cheap and hard to fake well. A genuine caseback has markings cut into the metal, with visible depth and clean edges under raking light. The reference number, brand markings, and serial should sit in the positions the factory uses, and the caseback should seat flush with even gaps around the rim.

• Genuine signs: engraving with consistent depth; letterforms with correct weight and spacing; a reference number that matches the case size and dial layout in front of you; a serial that lines up with a service record somewhere.
• Replica signs: shallow marks that look printed rather than cut; drifting letter spacing; a reference number that does not match the watch it is stamped on; a serial number that traces to nothing.

Use case: this check suits a buyer holding the watch or working from angled, high resolution photos. Straight on shots hide engraving depth, so ask for raking light images of the caseback and the lugs.

Criterion 2: Case, Crystal, and Dial Finishing

Machined surfaces are where replica cases give themselves away. Look at the transition between brushed and polished areas, the sharpness of lug edges, and the fit of the crown against the case tube. On the dial, check applied markers for consistent height and polish, and check that printed text sits on one baseline with uniform stroke width.

• Genuine signs: crisp brush lines with a clear direction change at case flanks; markers that reflect light the same way as the hands; date aperture with straight edges and a centered wheel.
• Replica signs: soft or rounded lug edges; fuzzy brush lines; markers sitting at slightly different heights; printed text that thickens in places; a date that sits high or low in the window.

Use case: buyers doing an in person inspection should bring a loupe and a bright, directional light. Daylight at an angle exposes more than a showroom spotlight.

Criterion 3: Movement and Case Interior

This is the check most replicas cannot pass. A watchmaker opening the case can compare the movement layout, finishing, and rotor decoration against the reference. Replica movements often use a different base caliber with decorative plates added, which shows in screw positions, jewel count, and the shape of the bridges.

• Genuine signs: movement architecture that matches the reference; finishing consistent under magnification; a rotor that matches the factory design; service marks from an authorized workshop.
• Replica signs: decorative plates hiding an unrelated base caliber; mismatched screw placement; rough anglage; a caseback gasket that does not fit its channel.

Use case: this is the only step worth paying for before a high value purchase. A bench inspection takes minutes and settles questions that photos never will.

Criterion 4: Box, Papers, and Service History

Documentation is easy to counterfeit, so treat it as a supporting signal rather than proof. A box and card set with no service record tells you less than a plain watch with a stamped service invoice from an authorized workshop.

• Genuine signs: paperwork with consistent print quality; a warranty or service record that a workshop can confirm; a seller willing to share the original purchase channel.
• Replica signs: paperwork printed on the wrong stock; mismatched serials between card and caseback; vague answers about where the watch came from.

Criterion 5: Seller Behavior and Price Logic

Pricing is the loudest signal. A genuine example offered far below the going rate for its condition, with no service history and pressure to close fast, is a warning. Sellers of real watches answer questions about reference numbers, movement, and provenance without hesitation.

• Genuine signs: willingness to meet at a watchmaker; clear return terms; consistent serial numbers across every photo.
• Replica signs: stock photos reused across listings; refusal to open the case; urgency tactics; payment methods with no buyer protection.

Which Check Fits Your Situation

Buying in person locally: skip the paperwork debate and go straight to a bench inspection, then verify the caseback against published reference data. Buying online from a distant seller: insist on angled caseback photos, a serial that appears in every image, and an escrow or authentication service before funds move. Already own the watch and want certainty: book a service estimate, since the workshop opens the case anyway and will flag anything non standard. Each path leads to the same place, movement verification, because that is the one step a replica cannot fake at the price it sells for.

If You Are Considering a Replica Instead

Buyers searching this reference often want the look without the outlay. That is a personal call, but three ground rules keep it clean: never resell a replica as genuine, buy only from sellers who label their product as a replica, and expect a different movement, so budget for service or accept that it may not be serviceable. A clearly labeled replica worn for style is a different thing from a fake passed off as the real reference, and the second one carries legal exposure in the United States.

Bottom Line

Reference data plus a movement inspection catches almost everything a photo cannot. Work the criteria in order, caseback first, then finishing, then movement, then paperwork, then seller behavior. If any single step fails badly, stop and walk away, because the cost of a mistake on this reference is far higher than the cost of a second opinion.