Top pick: the 41 mm automatic replica of the IWC Portugieser Chronograph IW371698 built on a decorated Valjoux 7750. It wins because IWC's calibre 69355 shares its basic layout with the 7750, so the small seconds at 6, the 30 minute totalizer at 12, and the date at 3 land where the original puts them. Get that spacing right and the watch reads correctly from across a table. The criteria used in this guide: dial printing and applied numerals, case profile and thickness, movement behavior, crystal and strap quality, and how the seller handles QC photos.
Why the IW371698 Punishes Cheap Builds
The 3716 family lives on negative space. The bezel is thin, the dial is large and mostly empty, and the case measures roughly 41 mm across at about 13 mm thick. There is no clutter to distract the eye from a crooked index, a date frame that sits off center, or a case that stands 1.5 mm too tall on the wrist. Busy chronographs forgive small errors. This one shows them at arm's length, which is why tier matters more here than on a dive watch replica.
Option 1: Quartz IW371698 Replicas
The cheapest versions run a quartz chronograph module in a steel-tone case. They photograph well and cost little, but the illusion ends the moment someone watches the chronograph hand.
Pros
- Lowest entry cost of any tier
- Light on the wrist and accurate over months
- No winding or servicing to think about
Cons
- The chronograph seconds hand ticks once per second, an instant giveaway
- Case back is a solid plate, so there is no movement to show
- Hands and applied numerals often look flat under direct light
- Pusher feel is vague, with little or no travel feedback
Use case: a single event, a photo shoot, or a costume look where the watch stays on the wrist and the case back stays closed. Skip it if anyone at the table knows watches.
Option 2: A7750 Automatic Builds (the Practical Choice)
This is the tier most buyers land on, and the one named as the top pick. A decorated Valjoux 7750 derivative gives you a sweeping chronograph hand, a display back, and the correct subdial geometry. The trade-offs are thickness and finishing consistency.
Pros
- Correct movement architecture, so the dial layout matches the original
- Smooth sweeping chronograph hand and a 28,800 vph beat rate
- Any competent watchmaker can service a 7750 base
- Available with a display back and rotor engraving
Cons
- Case thickness often runs 13.5 mm to 14.5 mm against the original's roughly 13 mm
- Rotor noise and a slight wobble are normal on this movement
- Print quality swings between batches, so QC photos are essential
- Chronograph seconds can stutter when amplitude is low
Use case: daily wear for someone who wants the correct silhouette and does not plan to open the case back in front of an audience. This is the best balance of look, function, and repairability.
Option 3: High-End Builds with a Corrected Case
The top tier targets dimensions first: a case closer to 13 mm, better anti-reflective coating, sharper dial printing, and a movement plate finished with perlage and Geneva stripes. Some builders go further and shave the caseback profile so the watch sits flatter on the wrist.
Pros
- Closest match on case thickness and lug curve
- Crisper dial text and better applied numerals under magnification
- Stronger anti-reflective coating, so the dial reads dark instead of washed out
- Better strap leather and a more convincing folding clasp
Cons
- Cost climbs fast for gains only a close inspection will reveal
- Slimmer cases sometimes use a manual-wind chronograph, which fails a simple rotor check
- Service options narrow, and parts are harder to source
Use case: buyers who handle the watch closely, compare it side by side with photos of the original, and accept a higher price for a thinner case.
Dial and Printing Checks
The dial carries two lines of text: the brand name under 12 and the chronograph designation above the 6 subdial. Check that both sit level, that the letter spacing is even, and that the text is not blurry at the edges. Look at the subdial rings: they should be fine and consistent, not thick and printed with visible dots. The date aperture at 3 needs a clean frame and a disc that sits flush. Hands should be leaf shaped with a soft curve, not flat stampings. There is little or no lume on this dial, so a bright glowing marker is a warning sign rather than a bonus.
Case, Lugs, and Thickness
Ask for a caliper photo of the case without the strap. Anything under 12.5 mm or over 14 mm on an automatic build is a compromise worth knowing about before you pay. Check the lug curve: the original tapers into the strap with a smooth arc, while cheap cases show a hard shoulder. On the side profile, the polished flank should meet the brushed caseback ring with a clean line. Pushers should be proportional to the crown, not oversized.
Movement and Timegrapher Expectations
Request a timegrapher shot at full wind. A healthy 7750-based build typically shows a rate inside about minus five to plus fifteen seconds per day, amplitude above 250 degrees, and beat error under 0.5 ms. Low amplitude explains a stuttering chronograph hand better than any dial flaw. Confirm that the chronograph starts, stops, and resets to zero each time, and that the date changes cleanly rather than dragging.
Crystal, Strap, and Caseback
IWC coats both faces of the crystal on many references, so a replica with coating only on the outside looks flatter and reflects more. Tilt the watch under a light and compare. The strap should be alligator grained with even stitching and a clasp that closes with a firm click. On the caseback, engraving depth matters more than the wording: shallow laser etching looks grey and soft, while proper engraving catches light along the edges.
What a Replica Still Will Not Do
Water resistance on the original is rated to 30 m, which means splashes and nothing more, and a replica is unlikely to match even that. Do not swim in it. Resale value does not exist, servicing is your responsibility, and the movement finishing under the display back will not survive a loupe. Treat it as a watch you wear and enjoy, not an asset.
Before You Pay: A Short Checklist
- Ask for dated QC photos of your actual watch, not catalog shots
- Get a thickness measurement and a timegrapher reading
- Confirm the chronograph resets to zero and the date flips cleanly
- Check dial text alignment at 12 and above the 6 subdial
- Confirm strap type, clasp style, and whether a spare strap is included
- Ask what happens if the watch arrives with a fault, and get it in writing