Watchlover42's recent
acquisition of a 5940J made me realise that an overview of this
Patek Philippe perpetual calendar model had not yet been done: so, here it is!
The case dimensions are 37 x 44.6 x 8.48 mm and the watch is powered by caliber 240 Q.
The model was introduced at Baselworld 2012 in yellow gold. Two white gold variants were added in 2014 and 2015. And, finally, a rose gold variant was introduced in 2017.
Best, Emmanuel
1/ Yellow gold, ref. 5940J-001 (2012)

credit: dunaliga (1-3) & bulangandsons
2/ White gold, silver dial, ref. 5940G-001 (2014)

credit: monochrome (1-7) & Sjx
3/ White gold, black dial, ref. 5940G-010 (2015)

credit: @watchzen (5 wrist shots) & Adonis watches
4/ Rose gold, ref. 5940R-001 (2017)

credit: LMHorlogerie & @nb.horology (last photo)