Quick answer
The 179171 is a 26 mm Rolex Datejust in Rolesor: a stainless steel case with an 18k yellow gold bezel and gold center links in the bracelet. Rolex built it with the Calibre 2235 and retired the reference in favor of the 28 mm 279171. A fake 179171 is any replica built to copy that layout. Good replicas match the case size, dial print and bracelet style closely. They do not match solid gold, the one-piece sapphire crystal or a real Rolex movement, and those three gaps are where an inspection ends the question.
The genuine reference at a glance
- Case diameter: 26 mm
- Material: Rolesor, steel case with 18k yellow gold bezel
- Bezel: smooth domed on the 179171, fluted on the 179173 sibling reference
- Movement: Rolex Calibre 2235, automatic, COSC certified, about 48 hours of power reserve
- Beat rate: 28,800 vibrations per hour, 31 jewels
- Crystal: sapphire with a Cyclops lens at 3 o'clock and a coronet etched into the glass at 6 o'clock
- Water resistance: 100 m
- Bracelet: Oyster or Jubilee with gold center links
- Status: discontinued, replaced by the 28 mm 279171
Most replica listings for this keyword copy either the diamond-dial version or the plain champagne dial. The reference number stays the same because the case and bezel do not change between dial options.
How to check a replica 179171
Work through the steps in order. You need a 10x loupe, a kitchen scale and a caseback opener.
- Weigh the watch on the scale. A genuine 26 mm Rolesor Datejust on a Jubilee bracelet lands in the 60 g to 70 g range depending on links and dial. Plated replicas usually sit 8 g to 15 g under that range.
- Inspect the wear points with the loupe: clasp edges, crown flutes and lug tips. Plated gold turns gray or copper at those spots. Solid 18k stays yellow through the full thickness.
- Look at the base of the Cyclops lens. Genuine magnification is 2.5x and the lens is formed into the sapphire. Replicas often glue a lens on and show a ring of adhesive at the joint.
- Shine a light across the crystal near 6 o'clock. Genuine crystal carries a faint laser-etched coronet. Replicas leave it off, place it off center or print a dot instead.
- Read the date through the loupe. Replica date wheels sit high or low in the window, use a wider font and show rough numeral edges. Genuine print is crisp and centered.
- Check the rehaut and the serial between the lugs at 12 o'clock. Genuine engraving is fine, even and consistent in depth. Replicas stamp shallow marks with uneven spacing.
- Open the caseback and count the beat rate. Genuine Calibre 2235 beats 8 times per second, so 120 beats in 15 seconds. Many replicas in this size class use a modified ETA 2671 or a Seagull movement at 6 beats per second, or 90 beats in 15 seconds.
- Flex the bracelet end links against the case. Genuine solid end links sit flush with no visible gap. Replica end links move and leave a shadow line at the lugs.
Two or more failures on that list means the watch is a replica, no matter how clean the dial looks in photos.
Where replicas get close
Case profile is the strongest part of a modern replica build. CNC machining holds the 26 mm diameter and the lug curve well, and the dial print on better examples is close enough that a photo comparison fails to separate them. Bracelet links, crown guards and the overall silhouette also pass a glance. The weakness sits in materials and assembly: gold content, crystal construction and movement architecture. Plan on a movement service or replacement within a few years on any clone, because parts availability and lubrication quality differ from a Rolex calibre.
Legal status in the United States
Selling, importing or distributing a counterfeit watch is a federal crime under 18 U.S.C. 2320, and 19 U.S.C. 1526 lets U.S. Customs and Border Protection seize counterfeit goods at the border. Buyers are not the usual target of enforcement, but reselling a replica as genuine is a different matter and carries real exposure. Keep that in mind before you treat any 179171 as an investment.
Common questions
Is the 179171 the same as the 179173?
No. The two share a case and movement, but the 179171 has a smooth domed bezel and the 179173 has a fluted bezel. Bezel style is the fastest way to tell them apart.
Do replica 179171 watches use real gold?
Some high-end replicas use gold plating or PVD coating that looks correct on arrival. Neither survives years of contact with skin and desks the way solid 18k does.
Can a jeweler confirm a replica?
Yes, and a watchmaker can go further by opening the caseback and measuring the beat rate. That single test settles most replica identifications.