Yes they are, Alex. And the hands were also lumed at one point. Possible military application? Here are the details from Longines, who are just great at providing information.
The serial number 5’653’870 identifies a wristwatch in stainless steel.
It is fitted with a Longines chronograph caliber 12.68Z Stop that was first produced in 1938.
It was invoiced to Messrs.’ Baume, who were for many years our agent for the UK, on the 07.07.1938.
Thus one took some work to get back in shape, but it was well worth the time and expense.
These seem to be popular with Japanese boutiques. Google 12.68z stop and you might chance upon a few for sale.
Best of luck
Larry