The short answer: the best fake Saxonia Big Date is the 38.5 mm two-disc build with a jumping outsize date module, because the date is the one part of a Lange that replica makers still get wrong. Case profile, dial printing, and hand shapes are solved problems at the top of the 1:1 market. The date is not. I ranked the options below on four criteria: how the two date discs behave, what movement sits behind them, how close the case and dial come to the original, and whether the seller stands behind the watch after it ships.
What "outsize date" means on a Saxonia
A. Lange & Söhne builds the outsize date from two separate discs, one for the tens and one for the units, both sitting behind a single aperture at 12 o'clock. The idea traces back to the five-minute clock in the Semper Opera House in Dresden, and the brand patented its own wristwatch version. Two discs in one frame means two parts must turn at the same moment and land with even gaps. Any mismatch shows from across a table.
That is where the money goes in a replica. A dial can be printed and a case can be polished in an afternoon. Building two discs that land inside one window with tight spacing and a clean midnight change takes a module, and a module costs more than a date wheel.
Option 1: Two-disc jumping module
This is the build to hunt for. The dial carries two stacked date discs, a small module sits between the movement and the dial, and the change at midnight is instant rather than a slow crawl. Spacing is the tell: on a good build the gap between the discs stays even across all 31 days, including the 30 and 31 rolls where a weak module drifts.
Pros
- Reads as an outsize date at arm's length, which is the point of the model.
- Instant jump matches how the original behaves at midnight.
- Wider parts supply, since the module is a known design.
Cons
- Highest cost of the three tiers.
- The module adds thickness, so check the side profile against the slim dress case you expect from a Saxonia.
- More moving parts means more that can fail, and a local watchmaker will not touch a date module on a copy.
Buy this one if the date is the reason you want the watch. If you only want the Saxonia silhouette, the next tier saves money and loses little.
Option 2: Single-disc lookalike
Some builds use one wide disc with both numbers printed on it, rotating behind a single wide window. The date always shows a correct figure, and a single disc is simpler to drive.
Pros
- Lower cost and fewer failure points.
- Alignment holds up over time, because there is one disc to center.
Cons
- Both numbers share one disc, so font weight and spacing never match the original.
- No true jump behavior, and the midnight change can drag.
- Close inspection of the window shows one piece of metal, not two.
This tier suits a buyer who wants the look on a desk or in a rotation and does not plan to hand the watch to anyone.
Option 3: Plain date window
The cheapest builds drop the outsize date story and use a standard date at 3 o'clock or a small window at 12. At that point you are buying a Saxonia-style case and dial with a generic calendar.
Pros
- Lowest price, and the easiest to keep running, since the movement is a stock Miyota or Seagull.
- A standard date wheel is a solved part, so reliability is high.
Cons
- Wrong complication. Anyone who knows the model sees it in one glance.
- Resale value is close to zero.
Skip this unless the watch is a beater and the date is an afterthought.
Movements behind the dial
Three bases show up in this market. A decorated hand-wound clone gives the best caseback view and the closest feel when you wind it, and it suits a two-disc module because the date can be driven off the hour wheel. A Miyota 9015 with a date module is the workhorse pick: cheap to replace and easy to regulate, though rotor noise shows up on some examples. Quartz sits at the bottom and is easy to spot, since the seconds hand ticks instead of sweeping. Ask what is inside before you pay, then ask for a movement photo with the caseback off.
Case, dial, and hands
The case is the strong point on most builds: brushed flanks, a polished bezel, and a correct lug curve. The Lange look lives in the finish contrast, so look for a sharp line between brushed and polished surfaces rather than a soft blend. A proper Saxonia dial is clean, with thin baton markers and a printed minute track. Printing that looks heavy or sits proud of the surface is the giveaway. Hands should be thin, with a polished bevel that catches light along the length.
Pre-purchase checklist
- Ask for a short video of the date changing at midnight, filmed on a phone with the time set close to 23:58.
- Confirm the disc count: two discs, or one printed disc.
- Get case diameter and thickness in millimeters, not adjectives.
- Ask which movement base is inside and whether the bridges or rotor carry decoration.
- Check the return window in writing, plus who pays return shipping.
- Confirm the crystal is sapphire, and ask about the anti-reflective coating, since coating changes how the dial reads.
Which build fits you
Choose the two-disc module if the date is the whole point of the purchase and you want a watch that survives a close look from a friend. Choose the single-disc build if you want the silhouette at a lower cost and treat the watch as a daily beater. Choose the plain date build only if the movement matters more to you than the dial layout. In every case, treat a replica as a replica: no copy of a Lange carries the same hand finishing, the same tolerances, or the same service network, and a seller who promises "identical to genuine" is selling a sentence, not a watch.
FAQ
Is any fake Saxonia Big Date perfect?
No. The outsize date mechanism, the movement finishing, and the dial furniture are three separate problems, and no build on the market solves all three at once.
Does the date set the same way as the original?
On the original, the outsize date is corrected with a small pusher on the case flank rather than through the crown. Some replicas copy the pusher, some leave it as a dummy, and some route correction through the crown. Ask before you buy if that detail matters to you.
Should I service a replica?
Not at brand prices, and not at a Lange service center, which will not work on a copy. If a Miyota base is inside, an independent watchmaker can swap or regulate it. If a date module is involved, plan to replace the watch rather than repair it.
Are gold replicas solid gold?
Assume plating unless the seller states the metal and shows a hallmark. Plating wears at the lugs and caseback edges first, which is where you should look on a used example.