Short answer
A solid replica IW323754 costs about $250 to $450. At that price the watch should have a 316L stainless steel case in the factory diameter, a dive bezel with firm click action and no backlash, a sapphire crystal with inner anti-reflective coating, applied hour markers with lume that glows for two hours, and a 28,800 vph automatic movement that hacks and hand-winds. Under $150 you get quartz or a low-grade automatic with printed markers and a loose bezel. Use the factory spec sheet as your ruler, not the seller's marketing copy.
Before you start
You cannot grade a replica against a random photo from a search result. Gather these items first.
- The factory spec sheet for the IW323754: case diameter, thickness, lug width, bezel type, crystal, water resistance rating, movement calibre.
- A high-resolution photo of the genuine dial in natural light.
- Digital calipers, a loupe or phone macro lens, and a timing app that reads beat rate in beats per hour.
- The seller's return policy in writing, plus a caseback photo of the exact unit you will receive.
How to check a replica IW323754, step by step
- Measure case diameter, thickness and lug width with calipers, then compare each figure to the factory numbers.
- Put the watch dial up under a lamp and inspect marker edges and text with a loupe; the print should be crisp with no bleeding.
- Charge the lume with a flashlight for 30 seconds, then check the glow in a dark room after ten minutes and after two hours.
- Rotate the bezel through a full turn, count the clicks and listen for a consistent sound with no free play at each stop.
- Breathe on the crystal and look for a purple or blue tint from the inner coating, then tilt the watch under a lamp and confirm the dial stays readable with no grey wash.
- Unscrew the crown, wind the movement about 20 turns by hand, push the crown in and confirm it seats against the case with no gap.
- Advance the date through a full month and watch for a centered numeral in the window, the correct font, and no drag marks on the dial.
- Flip the watch over and inspect the caseback engraving with a loupe; the reference number, serial and brand text should be cut into the metal, not printed on it.
- Set the watch on a timegrapher or timing app and read the beat rate; a proper automatic runs at 28,800 vph and hacks when you pull the crown.
- Wear the watch for 24 hours, note the daily rate, then book a pressure test with a local watchmaker before you swim in it.
Price tiers
- Under $150: quartz or cheap automatic, mineral glass, printed dial, plated case, loose bezel.
- $150 to $250: Asian automatic at 21,600 vph, sapphire on some units, fair dial print, weak lume.
- $250 to $450: the sweet spot for this reference: 316L steel, sapphire with AR coating, 28,800 vph movement, solid bracelet, useful lume.
- Above $450: ask what you are paying for. At that point a used genuine entry-level diver is close in price.
Red flags
- Stock photos only, with no caseback shot of the actual unit.
- A seller who refuses a return window or dodges questions about the movement.
- Claimed Swiss ETA at a $120 price. A real Swiss ebauche costs more than the whole watch.
- A 300 m water resistance claim with no gasket detail and no testing note.
- Weight that feels hollow. A steel dive case has real heft for its size.
Aftercare
Have the gaskets checked once a year if you swim with the watch. Keep it out of hot showers and saunas, since heat shortens gasket life. Store it in a dry box or on a winder, and take it to a watchmaker if the rate drifts past 15 seconds a day. A small service bill protects a few hundred dollars of watch.
Shipping and customs risk
Counterfeit goods are illegal to import into the United States, and U.S. Customs and Border Protection can seize a parcel. That means you can lose both the watch and your money. Ask the seller who carries the loss if a shipment is held, pay with a method that allows a chargeback, and treat that risk as part of the real cost rather than a footnote.