Omega® Crown (Waterproof, Tap 1.00 mm), steel, square, diameter 4.50 mm, see all case numbers in description LeCoultre® K490 80 mm (11) use stem

80 mm (11) use stem number 351-890

water-tight

Plastic domed crystal with an undercut reflector ring

Omega® 1611B

Omega® Crown (Waterproof, Tap 1.00 mm), steel, square, diameter 4.50 mm, see all case numbers in description LeCoultre® K490 80 mm (11) use stemOmega Crown (Waterproof, Tap 1. 00 mm), steel, square, diameter 4. 50 mm, see all case numbers in description Omega Steel Waterproof Crown, square, diameter 4. 50 mm, fits tube 2. 00 mm, total height 2. 80 mm, flush pipe, tap 1. 00 mm. Fits Omega case numbers: 1450040, 1960016, 1960054, 1960054SP, 1960065, 1980001, 1980027, 1980028, 1980042, 1980048, 1980059, 1980059169, 1950065169, 1980066, 3450803, 3960811 *Perrin Supply Ltd is independent of and