The Golden Ellipse 5738 is one of the harder Patek Philippe references to copy well. Its whole identity is thinness, the platinum 5738/50P measures 5.9 mm thick, plus a 34.5 x 39.5 mm elliptical case drawn to the golden ratio. Most replicas get the outline roughly right and the height badly wrong. If you are shopping for one, judge it in this order: case height, dial, movement, then everything else.

What the real 5738 is

Patek launched the Golden Ellipse in 1968 and marked the line's 50th birthday in 2018 with the 5738/50P-001, a platinum anniversary piece with a blue sunburst dial. There are gold versions too, and the proportions stay the same across them: a wide, flat ellipse with no lugs, a crown at 3 o'clock, and a case that flows straight into a narrow tapering strap. The movement is the calibre 240, a micro-rotor automatic that is about 2.5 mm thick. That movement is the reason the watch can be this thin at all.

The three things that decide replica quality

1. Case height and profile

This is where almost every fake gives itself away. The genuine article sits at 5.9 mm. A cheap replica of the 5738 usually measures 9 to 11 mm, and the extra bulk comes from a standard automatic movement with a full-size rotor. On the wrist, a 10 mm Ellipse looks like a different watch. Ask sellers for a caliper photo, not a spec sheet. If they will not show one, that answers the question. The mid-tier reps land around 8 mm, which is better but still visibly fatter than the real thing.

2. Dial and hands

The sunburst finish is the second tell. On a good dial, the light sweeps across in one continuous fan with no dead patches near the center. Cheap versions look flat, or the brush marks run in the wrong direction. Check the printed text: the brand name and the GOLDEN ELLIPSE line should be sharp and correctly spaced, with no bleeding at the edges. The hands are simple batons and should be polished, not chromed plastic. On gold models, look at whether the markers and hands match the case color, since mismatched tones are common on budget reps.

3. Movement

A true micro-rotor clone of the calibre 240 is rare and expensive. Most 5738 replicas run a Miyota 9039, a modified ETA 2892, or a Chinese automatic, all of which are thicker and none of which are finished like a Patek. If you open the back or look through a display case, you want to see a rotor that sits flush with the bridges. A hand-wound replica is sometimes the smarter buy at this size, because it removes the rotor thickness problem entirely.

Gold tone and case finish

Platinum replicas are the hardest to fake, because real platinum has a cool, slightly grey-white look and heft that steel cannot copy. Rose gold replicas usually come plated, and the plating wears through at the crown and caseback edges within a year or two of daily wear. Solid gold replicas exist but the price jumps past what most buyers expect. Look at the polish on the bezel: the Ellipse case is essentially one smooth curve, so any waviness or uneven reflection along that curve is a bad sign.

What they cost

• Entry level, 9 to 11 mm thick, plated gold: roughly $150 to $300
• Mid tier, 8 mm, better dial: roughly $350 to $650
• High end, close to genuine proportions with a decorated movement: $700 and up

Anything advertised at genuine-level thinness for $200 is almost certainly not what the photos show.

Practical and legal notes

In the United States, selling counterfeit goods is illegal, and customs can seize shipments of trademarked fakes. Buying one for personal use is a grey area that varies by state, and reselling a replica as genuine is straightforward fraud. Sellers in this niche generally market their watches openly as replicas, which keeps the transaction honest but does not make the goods legal to import. If you want the Ellipse look without that risk, a no-name homage with the same proportions is the cleaner route.