Reference 2138 is listed in vintage catalogs as a Rolex Ladybird, a ladies' watch in 18k gold from the 1950s. Counterfeits of this reference exist. Most use gold-plated steel cases with aftermarket dials. A check of hallmarks, weight, dial print, and movement separates them.
What Reference 2138 Is
Rolex used the Ladybird name for small ladies' watches with a 22 mm to 26 mm case. The 2138 sits in that group. Case metal was 18k yellow or white gold. The crystal is acrylic. The case has a screw-down back and a crown at 3 o'clock.
How to Spot a Fake Ladybird 2138 Brand Watch
Rolex does not publish a full online archive of vintage references. Production years for the 2138 are not in public Rolex material. Auction houses date the model to the 1950s. Confirm dates with a Rolex service center before you buy.
Buyer's Guide to Fake Ladybird 2138 Design Replica Watches
Hallmarks and Weight
An 18k Rolex case carries stamps inside the case back: the Rolex crown, "750" or "18K", and a Swiss assay mark. Stamps sit in a clean line. Fake stamps look shallow, doubled, or off-center.
Weigh the head. A solid 18k case of this size runs about 15 g to 25 g on its own. Gold-plated steel comes in lower and feels light in the hand. An XRF test or an acid test on an inside surface gives a number.
Plating wears at the lugs and crown. Look at the lug tips and the case edges under a loupe. Copper or nickel shows through on plated cases.
Dial and Hands
Original dials have sharp print. Letters sit on one baseline. The coronet has five points and even spacing. Repainted dials show soft edges, thick fonts, and paint on the lume plots.
Radium or tritium lume from the 1950s has a matte, cracked surface. New lume glows bright under UV. Original lume does not glow.
Movement and Case Back
The 2138 used a small Rolex manual or automatic movement. Ask the seller for a photo of the movement with the rotor and bridges in view. Genuine bridges carry Rolex stamps and a caliber number. Fake movements carry blank bridges or copies.
Inside the case back, Rolex stamps the reference. A serial sits between the lugs at 12 and 6. Numbers are crisp and aligned with the case curve.
Mixed-Part Watches
Many Ladybird 2138 listings mix parts: a real case, a new dial, a generic crown. Dealers call these franken watches. A genuine dial for this reference is scarce. A low price on a full gold watch is a signal to check serial numbers against the case style.
What Records Do Not Show
No public database lists every 2138 serial. Rolex service centers can confirm a case and movement match. Auction archives from Christie's and Sotheby's show past sales and photos. Use both when the seller cannot document the watch.