Rolex 3185

History: The Cal. 3185 was the replacement for the short-lived Cal. 3085, the first in-house Rolex mechanism to feature an independently adjustable 24-hour hand, and the caliber that sat inside the inaugural reference of the GMT-Master II from 1983. The ‘Fat Lady’ enjoyed just five years in production before being superseded by the second generation of the brand’s aviator watch, with the 3185 providing identical functionality, but with a slimmer profile that allowed for a return to a more gracefully proportioned case. The Cal. 3185, hand-slop and all, was made from 1988 to 2005, a long and successful run and one that was only upgraded due to the brand perfecting its Parachrom Bleu hairspring technology.

Manufacturer: Rolex SA (/ˈroʊlɛks/) is a Swiss luxury watchmaker. The company and its subsidiary Montres Tudor SA design, manufacture, distribute and service wristwatches sold under the Rolex and Tudor brands. Founded by Hans Wilsdorf and Alfred Davis in London, England in 1905 as Wilsdorf and Davis, Rolex moved its base of operations to Geneva, Switzerland in 1919. Forbes ranked Rolex 64th on its 2016 list of the world's most powerful global brands.[Rolex is the largest single high end watch brand. The company is owned by the Hans Wilsdorf Foundation, a private family trust.

Alfred Davis and his brother-in-law Hans Wilsdorf founded Wilsdorf and Davis, the company that would eventually become Rolex SA, in London, England in 1905. Wilsdorf and Davis' main commercial activity at the time involved importing Hermann Aegler's Swiss movements to England and placing them in high-quality watch cases made by Dennison and others. These early wristwatches were sold to jewellers, who then put their own names on the dial. The earliest watches from Wilsdorf and Davis were usually hallmarked "W&D" inside the caseback.

From Wikipedia