Thanks. The Vulcain Nautical is a lot like it's contemporary, the JLC Polaris... same exact case, even, if we're talking about the second iteration (my watch) from around 1962... but smarter. Here is a nice write-up of the heritage edition (which is quite faithful to the original), with an informative video.
https://www.hodinkee.com/blog/a-week-on-the-wrist-vulcain-nautical-cricketClick to expand...