Short answer first: "fake earth and moon" is a watch search term. Buyers use it for two things, moonphase replicas that track the lunar cycle and dials built around a rotating Earth or globe. A much smaller group means desk ornaments. If you want a watch, pick which of the two features you care about, because the parts, the price, and the failure points are not the same.
What the Phrase Usually Refers To
A moonphase adds a disc or a hand that follows the 29.5-day lunar month, visible through a small aperture or a ring on the dial. An Earth dial is a different animal. It puts a hemisphere, sometimes a full sphere, on a rotating plate, and it often pairs with a day/night ring or a GMT hand. Some designs stack both, and that overlap is where most of the visual appeal lives.
Moonphase Replicas: Where the Quality Difference Shows
On cheap moonphase builds the disc is printed plastic or thin stamped metal, and the aperture is cut off-center. Better ones use a textured disc with craters that catch light, a clean aperture edge, and a corrector pusher that advances the moon without dragging the date. Watch how the moon moves. Quartz versions tend to jump once at midnight, mechanical versions crawl. Neither is wrong, but you should know which one is on your wrist.
One common tell: a full moon sitting in the middle of the aperture on a night when the real moon is a thin crescent. That means the disc was fitted out of sync, and it usually points to a rushed assembly.
Earth Discs and Rotating Globes
Earth elements are harder to fake well. Color bleeds, and continents misalign where the two halves of the disc meet. Check the seam. If it slices through Africa or the Atlantic at a strange angle, that is a giveaway. Better builds use lacquer or enamel over metal, so the oceans have depth. Cheaper ones use printed vinyl or a decal, which looks flat and pasted under a loupe.
Checks Before You Buy
- Aperture edges: sharp, no paint bleed, no gap around the moon disc.
- Disc texture: craters should catch light instead of reading like a sticker.
- Corrector: recessed pusher, smooth travel, does not disturb the date.
- Alignment: moon phase matches the real cycle on the day it arrives.
- Earth print: continent shapes readable, no smear at the disc seam.
- Case finish: brushing lines even, no tool marks around the lugs.
- Rotor noise: no rattle, no grind when you tilt the watch.
Price Tiers and What You Get
Under $100 buys quartz, printed discs, and a dial that can fog in humidity. From roughly $150 to $400 you get sharp printing, a corrector that works, and a case that feels like metal instead of foil. Past that, you are paying for finishing and movement quality, not for the moon itself. Set a ceiling before you browse, or the Earth dial will talk you into a bigger number.
One Legal Note
Watches that carry another company's name and logo are counterfeit, and US customs can seize them at import. Unbranded or homage versions with the same general look avoid that problem and often come off the same line. If the logo is the whole point, you are paying extra for legal risk.