Mine is from 1967 and at a guess your one may be older. I find it very hard to get through the day without wearing this one for at least an hour or two.
This may be a bit delayed, but I too have one of these; and it's from 1967-it even says so on the dial!
Totally agreed-great pieces!!
Leaving HK but I just found out that I can only drop my Daughter in BKK and then will have to head straight to GZ, BJ and SH before returning to Singapore 😜 so will be with this one for almost 2 weeks more.