Dr No[Moderator Omega - Wristscan]
34899
Likely first owned by a British serviceman . . .
Nov 22, 2020,16:06 PM
. . . for whom the date 'June 6th 1940' held special significance. His name and that date are engraved on the back.
Dunkirk, possibly? According to online sources, the evacuation ended June 4th.