With fitted green Rolex presentation box.
Reference 6610 was launched in 1955 and fitted with calibre 1030 movement as well as the white printed centre seconds hand, typical for Rolex sports watches from the period. One of Rolex's most popular sports watches, the Explorer, is easily recognizable by its black dial with the luminous triangle at 12, luminous Arabic numerals for the other three quarters and luminous baton numerals for the remaining hours.
The present watch however is particularly unusual and rare as it is fitted with a highly attractive off-white dial and matching ivory-coloured luminous material to numerals and hands. This unusual dial was almost certainly made by special order.
A similar watch reference 1016 with off-white dial is described and illustrated in 100 Superlative Rolex Watches by John Goldberger, pp. 226 & 227.