A replica 1815 big date is a Lange-style dress watch built around an outsized date window, the two-disc display that made Saxon watchmaking famous in the 1990s. Most copies run 38 to 40 mm wide, use a hand-wound or automatic movement, and show the date through a stepped aperture near 12 o'clock. The name is loose: sellers use "1815 big date" for any Lange-inspired watch with a wide date, while the genuine 1815 line leans on a standard date.
Is the "1815 big date" name accurate?
A. Lange & Söhne sells the 1815 as a family of traditional dress watches, and the outsized date is best known from the Lange 1 that launched in 1994.
Replica sellers merge the two names. They borrow the classic 1815 dial layout (rail track, thin numerals, small seconds) and add a big date window for visual punch.
If you want the exact Saxon look, note which reference the copy follows. A photo of the real watch beside the replica tells you fast whether the date sits at 12, at 3, or under a subdial.
How does the big date work on a replica?
A real big date uses two discs. One carries the tens (0 to 3) and one carries the units (0 to 9), so both numbers land in a single wide window.
Good replicas copy that split. Both discs snap at midnight, and the gap between them stays even.
Cheap copies skip the second disc. The date prints on a single wheel, the font looks thin, and the change drags across several hours instead of jumping.
How to test the date before you pay
- Set the watch to the 30th, then push the date forward. A working big date jumps to 31 in one move.
- Check the gap between tens and units. Uneven spacing is the first sign of a low-grade module.
- Look at the numerals under light. Printed dates look flat; baked-on dates catch light at the edges.
- Roll from 31 to 1. A two-disc system resets both wheels at the same moment.
- Shake the watch and listen. A loose date module rattles.
Movement options and what they mean for the date
Quartz copies are the cheapest and the most common. Their big date is a sticker or a printed ring, so it never changes on its own.
Automatic and hand-wound versions cost more. Most use a Miyota 9015 base, a Seagull movement, or a Chinese hand-wound clone with an added date module.
That module is the weak point. Dirt, a bent lever, or a dry pivot stops the jump, and few local watchmakers will touch it.
Case, dial and strap details to compare
- Width: 38 to 40 mm suits most wrists. Anything past 42 mm looks wrong on a dress watch.
- Thickness: real dress watches sit near 9 to 11 mm. Copies with a date module add 2 to 3 mm.
- Lug width: 19 or 20 mm. A 20 mm strap is easier to replace.
- Dial: silver, blue, or black with a rail track ring and small seconds at 6.
- Crystal: sapphire on the front, and on the back if you want to see the movement.
- Strap: alligator-grain leather with a pin or deployant buckle.
Which dial layout should you pick?
The classic version uses a silver or cream dial with a rail track and small seconds at 6 o'clock. Blue and black variants look sharper under office light but show dust faster.
Check the date font against photos of the real reference. Narrow, tall numerals with a flat top on the "1" match the Saxon style.
Roman numerals suit the dress look. Arabic numerals read better in low light.
Common flaws in low-grade copies
Watch for a painted date, a case that sits high on the wrist, and hands with blunt tips and rough edges.
Print quality matters too. Crooked minute markers, thick fonts, and a smudged logo show up in daylight.
Water resistance is the last trap. A dress watch rated at 3 ATM survives rain and hand washing, nothing more.
What do replica 1815 big date watches cost?
Quartz copies sell for about $60 to $150. Automatic versions with a working two-disc date land near $150 to $400, and decorated high-grade builds run higher. Prices shift with the seller, so treat any single quote as a starting point.
Care and service
Wind a hand-wound copy at the same time each day and stop before you feel resistance.
Keep it away from speakers, magnets, and phones. A magnetized movement runs fast and the date may lag.
Skip the pool, the shower, and the sauna. Have the gaskets checked any time the case back comes off.
A service often costs more than the watch. Many owners swap the movement out instead, since parts are cheap and labor is not.
FAQ
Does the big date on a replica actually work?
On automatic and hand-wound versions, yes. On quartz models, most big dates are printed and never move.
Is a replica 1815 big date worth buying?
It depends on what you want. If you like the look of a Saxon dress watch with a wide date, a mid-range automatic copy delivers that for a fraction of the price of the original. Collectors who care about movement finishing tend to stay with the real thing.
What size is a replica 1815 big date?
Most copies sit between 38 and 40 mm across with a 20 mm lug width. That fits a 6.5 to 7.5 inch wrist with a little room.
Can I swim with it?
No. Dress-watch copies rated at 3 ATM handle splashes and rain, not swimming.
How long will it last?
A cared-for automatic copy runs for years. Quartz models last until the battery dies or the printed date fades.
What should I ask a seller first?
Request caliper photos of the case, caseback, and strap. Numbers beat marketing copy every time.