5170G, Chronograph, White Gold 3350 set over a black guilloché

set over a black guilloché with tritium applied indices

white sapphire jewels

Air & Space Museum

Almost an oxymoron

5170G, Chronograph, White Gold 3350 set over a black guillochéA ref. 5170G 010, the white gold, black dial variant of Patek Philippes first fully in house, non split seconds chronograph. The 5170 replaced the Lemania based 5070 in response to greater emphasis being placed on in house movement design and manufacture. Instead of merely replicating the Lemania 2310 the brand relied upon previously, Patek Philippe launched a 5 year design effort that led to 6 separate patents in the release of the 5170s calibre CH