Recently has emerged such marine chronometer.
The condition is very good, but I can't find the information on the 24 hour dial watch, although the 12 hour dials are quite common. There was, like, one auction on Sotheby's, but there's very little information on the watch. Since it is asked for a considerable price, do not want to make a mistake and buy Frankenstein, although at first glance everything is fine.
Isn't it kosher?