Could the wisdom of the hive assist me with this please. I have a Minerva chrono with the valjoux 71 movement, I am thinking it dates to early 1940's. It has 'import' at the bottom of the dial rather than swiss, swiss made etc. I haven't seen this before, I have seen 'foreign', but not 'import'. The case is just marked edelstahl and a number and the movement isn't marked at all on the back side, it probably is under the dial but I haven't had the dial off to look. Can anyone enlighten me please?