I would say timeless and elegant.
Not specially rare, you will still have some issues to find one like yours in such a god condition.
The movement, the 478 is not specially rare, as 80 000 were made in 20 years ( 1945 - 1965 ).
But it is a good, reliable and accurate movement, which was used in another very interesting watch, the JLC SHOM. Here is a link which may be of some interest: