Truly a historically significant model in the field of wristwatches, the reference 1518 was the first perpetual calendar chronograph wristwatch ever produced in series when it was introduced in 1941. According to literature, only 281 examples were made until the reference ceased production in 1954. It paved the way for successors references 2499, 3970, 5970 and finally, today’s 5270, which feature an in-house movement.

Vintage reference 1518s can generally be divided into two categories. The first comprises those most commonly found. While they range from showing little to heavy wear, they all display some kind of restoration or cleaning to the dial. These watches make up more than 90% of the reference 1518s on the market. Due to the reference's non-water-resistant snap-on case back, moisture easily seeped through the pushers or case back, resulting in a spotted or slightly tarnished dial just from exposure to humidity or perspiration. As a result, most reference 1518 dials have been "touched up" at some point.

The second exceedingly rare category, which the present watch falls into, comprises those that have seen no restoration or intervention at all. A parallel example in the car world would be the "preservation class". A survivor in all senses, these reference 1518s are untouched since they day they left the factory. While worn, they are 100% honest, character-laden and without a doubt, patinated.

The most defining feature of the present example is, without a doubt, is its spectacular, long-signature dial, which has gracefully aged over time developing a beautiful, silvery sheen. The enamel printing remains thick and defined, with the comma between “Patek and Philippe”, and "è" above "Genève" perfectly strong and present. The raised hard enamel printing throughout the rest of the dial no losses whatsoever, attesting to the dial’s total originality.
Equally impressive is its case. Its two strong and crisp hallmarks, with one under the lug and one on the side of the case are sharp and well-defined. The watch retains crisp edges and curved definition to the back of the lugs – a stunning feat, considering that many surviving examples have been polished over years of continuous wear.

This revolutionary model is a must-have for any serious collector of vintage Patek Philippe watches, and when such a well-preserved example comes to the market, it ticks all the boxes that collectors and scholars alike seek in a legendary vintage watch.