Visual Description
The 987904 is the Cougar in stainless steel. Finarte describes a stepped round steel case, and Piguet a crown set with a blue cabochon. Catalogs measure the case at 32 or 33 mm: Fellows and Piguet give 32 mm, Finarte and Bulang & Sons 33 mm.
The dial is silvered, cream or off-white, with black Roman numerals and a date at 3 o'clock, under blued steel hands. Fellows describes a signed stainless steel bracelet with a double folding clasp and Bulang & Sons an integrated Cartier bracelet; Finarte sold one on a leather strap. WannaBuyAWatch sold an example with a charcoal dial, applied silver Roman figures and silver hands.
Reference Significance
The 987904 is the all-steel version of the 33 mm Cougar. The Ref. 187904 is the same size with a steel case and an 18k yellow gold bezel, and the Ref. 887904 is 18k yellow gold. The 26 mm ladies' model in gold is the Ref. 887906.
Fellows, Finarte and Piguet catalog the 987904 as the Cougar. Bulang & Sons has listed one as a Santos Ronde in steel, and WannaBuyAWatch as a Cougar Santos Ronde, so a listing under either name may describe this watch.
Historical Context
Catalogs date the 987904 to the 1990s. Finarte dates the example it sold in Milan in December 2025 to the 1990s, Bulang & Sons dates one by its serial to the 1990s, and WannaBuyAWatch sold one cataloged circa 1990s. Loupe This dates the Cougar's launch, as the round member of the Panthère collection, to 1989.
The movement is quartz and signed Cartier. Piguet catalogs it as the Cal. 87 with 7 jewels, and Fellows as the Cal. 687 with a quick date set; no source we opened explains the two numbers.
What to Look For
Read the number on the watch: 987904 marks the steel Cougar, 187904 the steel model with a gold bezel and 887904 the gold one. Catalogs pair the 987904 with six-digit serials such as 001365 and 002088. Loupe This has offered an all-steel 33 mm Cougar on a steel bracelet as W5002F5; no catalog we opened prints W5002F5 together with 987904, so how the two numbers relate is open.
Check that the crown keeps its blue cabochon. Fellows noted stretch in the links of the bracelet on its example, so check the links and the double folding clasp. A listing at 32 mm or 33 mm describes the same watch.

