Big thanks to one of the members here. Here is the summer watch for 2011 and every summer after that... 1960 GMT (503.XXX s/n) with Gilt "tropical" dial with "officially certified chronometer" (OCC) only made less than a year in 1960. It has pointed crownguards(PCG), a mini 24 hand and a 1960 BIG logo bracelet. It just returned from RSC movement service. now all we need is sunshine !