Short answer
The phrase "how to fake IW328032" appears in search results that point to replica sellers. This page does not give steps for building a counterfeit. Manufacturing or selling a watch that carries a counterfeit IWC mark is a federal crime in the United States under 18 U.S.C. § 2320. What follows is how to tell a copy from a genuine watch, and what to check before you pay.
First, confirm the reference
IWC numbers its watches with "IW" plus digits. The Pilot's Watch Mark XVIII uses references in the IW3270xx range. The Pilot's Watch Mark XX uses IW3282xx. IW328032 fits neither range, and I could not confirm it in IWC's published catalog. IWC or an authorized dealer can confirm a reference. Ask before you buy.
Case back
The Mark XVIII and Mark XX both use a sapphire display back. You see the movement. Most copies in the $300 to $600 range ship with a solid steel back, or with a sapphire back over a rotor that does not match IWC finishing. Engraving on a genuine back is cut, not laser-etched. The reference number, serial number, and "Schaffhausen" sit in a line.
Movement
The Mark XX runs IWC calibre 32111 with a 120-hour power reserve. Wind the crown 40 turns, set the watch down, and check it 24 hours later. A copy with a generic Chinese or clone movement stops in 38 to 45 hours. Genuine IWC movements beat at 28,800 vibrations per hour, which is 8 beats per second. Look at the seconds hand under a loupe. A 21,600 vph movement, 6 beats per second, is a copy.
Fake IW328032 Review: Which IWC Pilot's Watch Replica Tier Is Worth Buying
Dial and hands
Genuine Mark series dials print "IWC" and "Schaffhausen" in a stack above the center. The Mark XX uses applied numerals with lume fill. The Mark XVIII uses printed numerals. Copies show lume that sits above the printed edge, uneven numeral spacing, and a date window that does not align with the 3 o'clock axis.
Case and dimensions
Both references measure 40 mm across. Thickness is 10.8 mm on the Mark XX and 11 mm on the Mark XVIII. Water resistance is 100 m on the Mark XX and 60 m on the Mark XVIII. Copies come in at 40.5 mm or 41 mm and 12 mm thick, because the case is machined around a generic movement. Measure with calipers.
Price and provenance
The Mark XX retails between about $5,500 and $6,500, depending on strap or bracelet. Used examples trade between $3,500 and $5,000. A listing at $700 with box and papers is a copy. Papers with a matching reference and serial, a stamped warranty card, and a receipt from an authorized dealer carry the most weight.
Serial numbers
IWC case backs carry an engraved reference number and a case serial. IWC does not run a public online serial lookup. An authorized dealer or an IWC service center can verify a serial against their records. A seller who refuses a service-center check is a risk.
Where copies come from
Replica IWC watches are made in Guangzhou and sold through sites that use the word "superclone." Prices run from $280 to $650. These watches carry counterfeit trademarks. Importing one into the United States can lead to seizure by Customs and Border Protection and to criminal charges for the seller.
If you own a copy
Do not sell it or ship it across a border. Sale and import are the acts that carry penalties. A local watchmaker can service the movement as a generic watch. No authorized IWC service center will work on it.