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
Datasheet for Rodan GR-1, GR-2, GR-3, GR-4, GR-5, GR-6, GR-7, GR-8 and GR-11
1958_GR-1_2
Datasheet for Rodan GR-11
1959_GR-11
Datasheet for Rodan GR-110 and GR-116
1970_GR-110_116
Rodan Brochure for CD11, CD12, CD13, CD14, CD15, CD20, CD21, CD22, CD23, CD24, CD25, CD27, CD28, CD38, CD40, CD42, CD43, CD47, CD66, GR-111a, GR-116, GR-110, GR-211, MG-17G, MG-19B, CD78, GR-111pa
1970_D4512-AA-1
Rodan brochure for CD11, CD12, CD13, CD24, CD25, GR-414, GR-211, GR-311, GR-110, GR-116p, GR-111p, CD66p, MG-17G, MG-137, MG-157
1974_ED4907-AA-1
Datasheet for Rodan CD11, CD12, CD27, GR-211, GR-311 and GR-414
1976_F5201-1