What IW329081 means

IW329081 does not appear in IWC's public reference list. The number sits in the IW3290 block, which covers the Pilot's Watch Mark XVIII: 40 mm steel case, black or blue dial, date at 3 o'clock, caliber 35111. Sellers use IW329081 as a listing label for a Mark XVIII style replica. Judge the watch on its own measurements, not on the number in the title.

Specs the original carries

  • Case: stainless steel, 40 mm diameter, about 11 mm thick
  • Lug width: 20 mm
  • Crystal: sapphire, anti-reflective coating on both faces
  • Water resistance: 60 m
  • Movement: caliber 35111, automatic, 25 jewels, 28,800 vph, 42 hour power reserve
  • Dial: matte black, white printed numerals, triangle at 12
  • Date window at 3 o'clock, white disc, black text
  • Soft iron inner case for magnetic shielding

Movements found in replicas

Three grades appear on the market. Quartz copies run at 1 beat per second and cost the least. Copies with an Asian 2892 run at 6 beats per second and hold about 40 hours. Copies with a Sellita SW300 clone run at 8 beats per second, the same rate as caliber 35111. Watch the seconds hand or listen to the case: 8 ticks per second marks the top tier.

Inspection steps

  1. Measure the case with calipers. 40.0 mm is correct. Copies at 42 mm and 43 mm are common.
  2. Measure the thickness. Above 12.5 mm means a thick movement spacer sits inside.
  3. Check the lug width with a ruler. 20 mm fits the original strap range.
  4. Watch the date change near midnight. It should flip inside 10 minutes.
  5. Look at the dial print under a loupe. Letter edges should stay sharp.
  6. Weigh the head. A steel 40 mm case with a leather strap lands near 70 g to 80 g.
  7. Turn the crown. Threads should engage in under one turn.

Common tells

  • Date font wider than the original
  • Anti-reflective coating with a strong blue cast
  • Caseback engraving shallow, text size uneven
  • Rotor engraving in the wrong font
  • Seconds hand that stutters at 6 beats per second

Price bands

Quartz copies: USD 50 to 100. Asian 2892 copies: USD 150 to 350. SW300 clone copies: USD 400 and up. Price tracks the movement and the case finishing, not the reference number on the listing.

Water resistance

Replica gaskets are not pressure tested at the factory. Keep the watch away from showers, pools, and salt water. A watchmaker can test and seal it for a fee. The result is not guaranteed.