Rodan-Okaya Tubes

Tubes made by Rodan-Okaya. From their web site:

In 1958, we delivered our first number display tube and started production of display discharge tubes GR-1, GR-2.

In 1962 we registered the trademark “Rodan”

Though they themselves used both “Rodan” and “Rodin”.
Datasheets are at the end of this page
1958_GR-1_2

 

1959_GR-11

 

1970_GR-110_116

 

1970_D4512-AA-1

 

1974_ED4907-AA-1

 

1976_F5201-1