Tom, yes you have good memory. i read and learnt from the Chronometer Wristwatch book which said that both cal.70.1 and cal.70.3 were made for the chronometer line.
i am out of town, maybe i will post some pics of the movement and also the caseback which the latter shows the "chronometer" word on it after returning home later.
stefan
This message has been edited by Stefan on 2010-02-13 07:25:51