The short answer
A fake Ladybird 2138 is a copy of Rolex's small vintage ladies' dress watch from the late 1950s, and most watches sold under that name today are not high-grade 1:1 replicas at all. They are franken builds, generic 20-something-millimeter gold-tone watches with a Rolex-style dial, or completely mislabeled modern Lady-Datejust models. Real replica factories chase volume, and a tiny vintage ladies' reference does not generate much of it. So if you want one, judge the case, the dial, and the bracelet first, and treat the reference number on the listing as the least reliable piece of information you have.
What the genuine 2138 actually is
The Ladybird is Rolex's vintage ladies' line, launched in the late 1950s, and 2138 sits inside that family. These are dress watches, not sports models. Expect a case in the low-to-mid 20mm range depending on the year, 18k yellow or white gold (some UK-market examples were 9k), a slim bezel, and a restrained dial with applied or printed markers. Most run a small manual-wind or early automatic movement, and plenty came on a riveted or Jubilee-style bracelet. The case is small and the design is quiet, which means nearly all of the visual weight lands on two things: the dial printing and the bracelet.
Why dedicated 1:1 copies are rare
There is not much money in copying a 23mm gold watch. Buyers who want a replica usually want something they can wear visibly, and factories respond to that. What you find instead is a supply chain of small gold-tone ladies' watches with generic movements, plus a smaller number of franken pieces where someone drops a genuine or refinished dial into an aftermarket case and calls it a Ladybird. That is not the same product, and it should not be priced like it.
What I check on a copy
- Case profile. Vintage gold cases have a soft, slightly tapered lug shape. Cheap copies look flat and slab-sided, and the lugs are often too thick for the case size.
- Gold color. Yellow plating on a small case shows wear fast, especially at the lugs and crown. Look at how the color reads against the bracelet, because mismatched tones are the giveaway on a two-piece build.
- Dial printing. On a small dial, bad text is obvious under a loupe. Letter spacing should be even, the coronet should sit level, and the minute track should not smear into the markers.
- Bracelet. This is where most of the money goes on a replica of any Rolex. On a tiny case, an aftermarket Jubilee usually has stamped, rattly links and a clasp with the wrong stamp depth.
- Hallmarks and caseback. Real vintage gold carries hallmarks that match the case metal. Copies either skip them or stamp them too deeply with the wrong font.
Movements you will actually find
Inside a copy, expect one of three things: a cheap quartz, a generic 17-jewel hand-wind, or a small Chinese automatic. None of these is a genuine-caliber equivalent, and at this case size nobody can see the movement anyway. What matters more is whether it keeps time and starts reliably, because a ladies' movement this small is fussy to service and often not worth repairing.
Pricing and expectations
A decent small gold-tone ladies' replica should cost well under what a full-size 1:1 sells for, and anything priced like a flagship Submariner copy is being sold on the reference number rather than the build. If a listing shows large, sharp studio photos of a genuine watch and ships a generic version, that is normal. If it shows a 26mm case and calls it a 2138, that is a fantasy listing. Ask for actual measurements and photos of the watch being sold, not catalog images.
Bottom line
Treat the fake Ladybird 2138 as a small dress watch, not a replica showcase. Buy it if the case, dial, and bracelet hold up on their own merits, and skip it if the only argument is the name on the listing.