Accompanied by Patek Philippe Extract from the Archives confirming production of the present watch in 1963 and its subsequent sale on 28 May 1963.
Production of the reference 2508 began in 1951. Very few examples were produced in stainless steel. The model is illustrated in Patek Philippe Wristwatches by Martin Huber & Alan Banbery, 2nd edition, pp. 204, pl. 328.