IWC serial number checker, year by year to 1975

It depends on the age. On vintage pieces it is on the movement, so the caseback has to come off. On modern wristwatches it is engraved on the outside of the caseback, and if the watch has a display back you can often read it on the movement bridge. On pre-1975 watches it is sometimes stamped inside the caseback as well.

Because that is where the year-by-year record stops. Those tables run from 1884 and end at the figure they give for 1975, 2,275,000. Compilations that carry on past it do exist, and they contradict each other outright. One puts the decade after 1975 at 2,000,000 to 2,499,999 and reaches 2005 onward at 3,500,000; an established dealer's chart puts the same decade at 2,300,001 to 2,900,000 and does not reach 2005 until 4,200,001. A movement numbered 3,600,000 is therefore after 2005 on one chart and before it on the other, and a third guide says IWC moved away from serials that encode a year at all after 1975. None of them cites IWC. That is why 1974 is the last year this checker will name: the record says where 1975 starts but never where it ends, so a serial at or above 2,275,000 comes back as 1975 or later with no year attached. Picking one of those later charts would be taking a side, not reading a record.

Usually a single year, which is unusual for a watch brand. The IWC record is published year by year rather than every five or ten, so most serials land inside one year's band. Two years, 1925 and 1926, are returned together, because the figure published for 1926 is lower than the years on either side of it and is therefore a corruption we will not guess at.

It belongs to the old system, which IWC ran from 1875 to 1883 before restarting the count at 6,501 in 1884. That early run used different numbering and is not covered by this table. A watch that old needs the archive, not a chart.

Yes, but not by email with a serial number. IWC does not sell an Extract from the Archives. The document it issues is a Certificate of Authenticity: the watch is received at IWC in Schaffhausen, an authenticity committee of heritage watchmakers and museum staff examines it, and the certificate states the model name and reference, the case materials, the movement calibre and the date the watch left the manufacture. IWC publishes no price, so have your boutique or authorised retailer arrange it and quote you.

Approximate, and the sources say so themselves. IWC does not publish a serial chart directly; the strongest table available is credited to research citing IWC's own website. It is far better sourced than most watch charts, and it is still a reconstruction.

The reference, written as IW and a run of digits such as IW371604, names the model and its configuration, so every watch of that variant shares it and it carries no date. The serial identifies your watch alone, and it is the number this table reads. IWC has never published what the reference digits mean, so nobody can decode one honestly. Separately, an IWC carries both a movement number and a case number from two different series, and it is the movement number that the year table dates.

No. Counterfeits carry serial numbers, and one that lands in a plausible year is easy to engrave. The movement calibre, the dial printing and the case finishing decide it, and those cannot be read from a number.