To celebrate the 250th anniversary of one of the most reputable Swiss retailers of fine timepieces and a long-time retailer of Patek Philippe, Beyer in collaboration with Patek Philippe released the handsome and rare limited-edition series of the chronograph ref. 5170 in yellow gold of 50 pieces. It not only displays a tachymeter scale, but also features the storied retailer's signature at 6 o'clock. So exclusive was this limited edition, that Patek Philippe created a special engraved caseback and presentation box in honour of the retailer's anniversary. Double signed pieces from Patek Philippe are extremely exclusive and only a few special retailers of the brand have had the privilege to do so over the decades.

Preserved in excellent condition, the present watch is complete with its original certificate, additional caseback bearing "Patek Philippe No 42/50 Fabriquée pour le 250ème de Beyer à Zürich 1760 - 2010" and Patek Philippe box with a special engraving.