According to the Amazon page on this Vestal USS Observer Chrono:

It's supposed to be made in Japan.  My unit came with a nearly invisible sticker that clearly says, "Made in China".

It did not come with any instructions nor warranty paperwork.

The Vestal website does not show the "chrono" version of this watch as being a current model!

I never could figure out how to even set the time on this thing.  The middle "button" is really a screw-cover that supposedly has multiple positions to set and operate the watch.  All it does is unscrew to reveal a small push-button underneath, which seemingly does nothing.

The "luminous" portion of the dial is weak at best, and the greenish glow doesn't last but more than 5-10 seconds, then totally fades into nothingness.  A good luminous watch dial will hold a luminescent glow for several minutes - even an hour or more.

I suspect this is a CHINESE KNOCKOFF of a Vestal product.

DO NOT purchase this product!