Zenith Defy reference A3642 "Cassaforte" with grey dial Reference 3400 in platinum is

Reference 3400 in platinum is the most prestigious expression of the early Marine line

Jardur is one of those American-market names that serious collectors have quietly rediscovered — a brand that sourced its movements and cases from the finest Swiss suppliers and sold the results through the US market at a time when American buyers demanded genuine quality

with a rotating bezel

a form that prioritises elegance over wearability and is all the more compelling for it

but somehow more resolved than either — a shape that sits on the wrist with a naturalness that more conventional geometries rarely achieve

Zenith Defy reference A3642 "Cassaforte" with grey dial Reference 3400 in platinum isThe Zenith Defy was introduced in 1969 as the maison's answer to the growing demand for robust, water resistant sport watches. Its name said everything: defy. The case was engineered for resilience thick, tightly sealed, built to take whatever its owner threw at it. Italian collectors would later nickname it "Cassaforte" safe, as in bank vault a tribute to the fortress like construction that made it a reference among tool watches of the era. Reference