Quick answer
A replica Datograph is a copy of the A. Lange & Söhne Datograph, and the versions worth discussing cost roughly $400 to $900. Almost every decent one runs a Seagull ST19 manual-wind chronograph, because that movement's layout happens to match Lange's: running seconds on the left, a 30-minute counter on the right. From the dial side, a good copy reads close to the real thing at arm's length. Through the case back, it doesn't come close, and anyone who knows the watch will spot it in seconds.
What the real Datograph actually is
Lange introduced the Datograph in 1999, five years after the brand came back to life. It was the company's first chronograph since the relaunch and the first to run a fully in-house chronograph movement, the L951.1. Manual wind, column wheel, horizontal clutch, flyback, and a minute counter that jumps a full minute at once instead of creeping forward. The outsize date at 12 is the other signature. Cases ran about 39mm wide and 13mm thick in platinum, rose gold, and white gold.
The watch matters to collectors for one reason above all others: the movement. Glashütte ribbing, a hand-engraved balance cock, screwed gold chatons, black-polished steel parts, all visible through the sapphire back. That finishing is what drives the price. The dial is almost secondary.
Why the Datograph is hard to fake
- The finishing. Hand engraving and black polishing are done by people, not machines. No replica at any price reproduces either one.
- The minute counter. Real Datographs snap over a full minute. Most copies drag.
- The date. Lange's outsize date flips at midnight. Cheap versions roll over slowly or sit crooked in the window.
- Case height. Copies usually run a millimeter or two thicker than the real case, which changes how it sits on the wrist.
- Pusher feel. A column wheel with a horizontal clutch starts light and clean. A 7750-based copy feels mushy.
What the better replicas do get right
Layout, mostly. Dial proportions, the twin subdials, the tachymeter scale, and the big date at 12 can look convincing in photos, which is exactly why buyers get burned. Case diameter and lug shape on the top versions are close enough that the watch reads correctly on a wrist. Blued hands and a sapphire crystal are standard now, even at the mid tier.
The movement inside
Two families cover nearly everything you'll see. The Seagull ST19 is the better architectural match: manual wind, column wheel, running seconds at 9 and a 30-minute counter at 3, same as the original. The other common base is a 7750-style automatic, which is thicker and has to be modified to shift the registers into the right positions. Some sellers dress the ST19 with engraved plates and a decorative balance cock. That looks busy in a product photo and wrong in person. The one feature no copy has replicated is the precisely jumping minute counter.
Tells to check before you buy
- Ask for a photo of the movement, not just the dial. If the seller won't send one, walk away.
- Study the date window at 12. Font, alignment, and whether both discs sit level.
- Get the thickness. Under 14mm is acceptable for a copy. Under 13mm is a claim worth doubting.
- Compare subdial spacing, pushers, crown, and lugs against a photo of a real one.
- Ask what movement is inside by name. "Swiss movement" with no detail usually means a Chinese automatic.
What it costs
Replica Datographs cluster between $400 and $900. Below $300 you're typically looking at quartz or a low-grade automatic with a printed dial. Genuine Datographs trade in the high five figures to low six figures on the secondary market, and the Up/Down version sits in the same range. That price gap is the whole reason the replica market exists, and it's also why the small details are so easy to get wrong.
What US law says about it
Selling counterfeit watches is a federal crime in the United States, and US Customs can seize imported counterfeits. If a shipment gets stopped, you generally don't get your money back from the seller. Worth knowing before you order anything.