The "Big Crown" Submariner reference 5510 was introduced in 1958 and made for a very short period only. The watch was fitted with the new Rolex calibre, 1530, and was the third interpretation of the "Big Crown" Submariner and was eventually replaced by the reference 5512 in 1959. Compared to its predecessor, the case is much thicker to house the new 1030 movement. Yet, many key vital elements remain the same, such as the black lacquer ‘Swiss’ dial, lack of crown guards and 8 millimeter Brevet ‘big’ crown.

The quality of the dial of this timepiece cannot be overstated. Absolutely unrestored, it maintains the original glossy finish (which often clouds with age) as well as the original luminous material, now a charming camel hue. There are barely any signs of ageing on the dial and it still retains a very strong mirrored finish.

The case is as impressive as the dial. It has been preserved wonderfully and retains its beveled edges, and the numbers between the lugs remain crisp and visible. Tool watches were initially considered ‘everyday’ items, rather than ‘precious’ watches. In fact, it was common for their owners to wear and polish them frequently. To find one in such original condition is delightful.