Short answer
A replica IW545110 stands or falls on four things: case proportions, dial printing, hand finish, and what sits under the caseback. Nothing else moves the needle much. If the seller can't send a straight-on dial photo and a clear shot of the movement, you have nothing to judge with, and the deal should stop there.
What the IW545110 is
It belongs to IWC's classic hand-wound family, the Portuguese line, with a clean dial and a small seconds subdial instead of a busy chronograph layout. That simplicity is exactly what makes it hard to copy well. There's nowhere to hide sloppy printing or a case that's half a millimeter too thick. Before you compare any replica against anything, pull up IWC's own reference photos and a few high-resolution shots from auction listings, then work from those as your baseline.
The five checkpoints
1. Case and crystal
Ask for numbers, not impressions: diameter, lug width, and thickness in millimeters. Then compare them to the genuine specs. Replica factories often nail the diameter and miss the thickness, and extra height shows up in profile shots. Check the crystal too. A domed sapphire should curve smoothly with no visible edge line where it meets the bezel, and no milky haze at the edges.
2. Dial and printing
Zoom in hard. On a dial this plain, the text, the minute track, and the subdial rings are the entire design. Lettering should be crisp, evenly spaced, and the same weight as the original. A subdial that isn't centered, or a subdial hand mounted too high or too low, is the most common tell on this reference. Look at how the markers catch light as well. Applied indices should have clean bevels rather than flat tops.
3. Hands and crown
Hands are where budget replicas give themselves away. Check the length and shape, especially the tip of each hand and how far it reaches toward the track. The crown should feel solid, turn without grinding, and match the genuine profile. If winding feels gritty or the crown wobbles in the tube, that's a mechanical problem, not a cosmetic one, and it won't fix itself.
4. Movement
This reference is hand-wound. A replica running an automatic movement with a rotor is wrong no matter how pretty the decoration looks through the back. Ask which movement is inside, how many jewels, and the power reserve. A decorated Asian hand-wound with correct finishing on the bridges is a defensible choice. A generic automatic is not.
5. Caseback and engraving
Depth and font matter more than people expect. Engraving that looks shallow, too wide, or printed rather than cut is an instant tell. Reference number, serial, and hallmarks should sit in the right places and use the right typeface.
Photos worth asking for
- Straight-on dial shot, no angle, no filter
- Side profile, so you can judge thickness and case shape
- Macro of the dial text and the subdial
- Caseback with the engraving in focus
- Movement shot with the back off, if the watch has an exhibition back
- A short video of the subdial hand running and the crown being wound
Price is a signal, not a promise
Cheap often means corners cut in the movement or the finishing. Expensive doesn't automatically mean accurate either. Spend your budget where it shows: dial, case, movement, in that order. A flawless dial on a badly finished movement is still a watch you'll stop wearing after a month.
Bottom line
Judge the IW545110 replica the way you'd judge any dress watch. Dimensions first, dial second, movement third. Get clear photos, compare them against original reference images, and never buy from a single glamour shot. If a seller dodges the movement question, move on.