If you are interested in the story of Bridgland & King you had better go back to yesterday’s post. Further research today made the plot thicken! Who did actually make the button in question?
I have not seen Embassy buttons like this before! The font looks like what was used by G. J. Coles in the 1950s. The buttons are made of trochus shell, the 2-holed button backs showing the tell-tale red-brown streaks.
Importation of pearl-shell into Japan for button manufacturing was only “allowed” in 1947 under MacArthur’s control of the country’s rebuilding post WW2, although it may have taken a couple of years for shell to made it to Japan.