I know nothing about Smiths watches other than the company also make automitve gages that are well respected. I am very happy with the Nomos that is in my collection.
As of this morning, a Cincinnatus Field Watch by Cincinnati Watch Co. Passing by a store that carries them on the trip to Detroit that starts tomorrow.
Looks like the bezel is of similar construction. I have seen "sandwich" bezels on multiple watches.
Nice watch, btw.