With Patek Philippe Extract from the Archives confirming production of the present watch with raised gold indexes in 1948 and its subsequent sale on 21 September 1950.
This "World Time" reference 605 HU is distinguished by its very good, original overall condition.
Reference 605 was in production from 1941 until the mid-1960s and available in yellow and pink gold cases, either with a plain metal dial or a unique cloisonné enamel dial. The latter could depict individual continents, hemispheres or even the entire planet. For a note on Patek Philippe's world time watches and Louis Cottier see lot 64 in this auction.
A reference 605 HU in pink gold is described and illustrated in Patek Philippe Museum - Patek Philippe Watches - Volume II, p. 339, Inv. P-207.