Any ideas? Picked this up awhile back on ebay forget what i paid been that long. very nice watch keeps great time. Not a huge fan of automatics but this one is nice.
Why are you focusing so much on 1966 ads? Obviously, because your watch is dated 1966, but that's not a good reason to limit your search of the ads to that year. Most watches weren't produced for just one year, nor were they advertised for just one year, nor can you count on an ad being dated the same year as your watch. You should be looking at all the 1960 ads, and probably some late 1950s and early 1970s as well.
If you look at all the ads for the 1960s, paying attention to the features of each line of watches, at the very least, you'll limit the options of what it could be. And you may learn something more about 1960s watches in the process.
Jim You say you looped the rotor of movement and its an M6. Still looks like M5 to me, but I didn't use a loop, just your photo.
Also looks like the "V" variant.
This exact same watch has two different records. The other record is here.
