A fake Lange 1 191 ET is a replica of the A. Lange & Söhne Lange 1 built around the reference prefix 191. The letters in the listing are a seller tag, not an official Lange code. Grade one by checking four things in order: case dimensions, the outsize date, dial printing and hand finish, and the hand-wound movement behind the sapphire back. Get all four right and the watch reads as a Lange 1 from arm's length. Miss the date mechanism or the case thickness and it does not.
What the 191 Reference Covers
Lange reference numbers group by model family first and by case metal and dial second. The 191 prefix sits inside the modern Lange 1 line, so a watch sold under it should carry the Lange 1 layout: an off-center main dial at 9 o'clock, a small seconds subdial at 5, a power reserve indicator at 3, and the outsize date in the upper right. Case size is 38.5 mm across and roughly 10 mm thick on the original. Replicas rarely match all of those numbers at once, and the thickness figure is where most of them fail.
Prerequisites
- Digital calipers, or a ruler and a steady hand
- A loupe or a phone macro lens
- Clear photos of the genuine reference for side-by-side comparison
- A small caseback tool if you plan to open the watch
- Awareness that counterfeit branded watches are illegal to import and sell in the United States
How to Grade a Replica Lange 1 Step by Step
- Measure the case across the bezel at 3 and 9 o'clock, crown excluded, and compare the reading against 38.5 mm.
- Measure total thickness from caseback to crystal center and compare against 10 mm.
- Check lug width at 20 mm and confirm the strap sits flush with the lugs with no gap.
- Study the outsize date through the loupe: two separate apertures, even spacing, and both discs sitting on the same baseline.
- Watch the date change at midnight and confirm it snaps rather than rolls slowly.
- Compare dial proportions against a reference photo: main dial position, subdial spacing, and the printed track width.
- Inspect the hands for faceted sides and polished bevels, not flat stamped metal.
- Turn the watch over and check the sapphire back for ribbing, blued screws, and an engraved balance cock.
- Wind the crown slowly and feel for grit or backlash through the full 72-hour reserve range.
- Tilt the crystal under a lamp and confirm anti-reflective coating on both surfaces.
The Outsize Date Is the Tell
Lange's date display uses two separate discs that jump together through a cross-shaped mechanism. Copies usually simplify this to a single disc behind a mask or to two discs driven by one gear. Look for a visible seam between the two number windows and a crisp edge on each numeral. Soft edges, uneven digit height, or a date that sits off-center inside the window are the fastest signs of a low-tier build. On better replicas the date is the single most expensive part to get right, so it is also where a seller's claimed tier shows up first.
Case Back and Movement
A hand-wound movement is the correct setup here, so a rotor visible through the back is an immediate mismatch. Beyond that, check decoration quality rather than decoration presence. Real Glashütte ribbing runs in even bands with sharp edges. Printed or stamped finishes look flat under a loupe and lose depth when the light moves. Engraved balance cocks on replicas are often laser-etched, which reads as shallow and gray rather than cut.
Red Flags
- Case diameter over 40 mm or under 37 mm
- Thickness above 11 mm, which pushes the watch off the wrist
- Date windows fused into one opening
- Caseback photos that are blurry, angled, or reused across listings
- Sellers who call the 191 prefix a limited edition without documentation
Realistic Expectations
Even a strong replica will show differences in hand finishing, crystal clarity, and long-term rate stability. Budget for a service interval, keep the watch away from water unless the gasket is verified, and treat the strap as a wear item. If the date mechanism and the case dimensions check out, the rest of the watch is usually good enough for daily wear.