Great find! I have an Andorra 2850 that I like very much.
Can you post some pictures? The I will be able to tell you more.
1965 - Masaru Kono No.5
1970 - Sakazo Nakade 600E
1975 - Atushi Nakamura No.15
1996 - Masaru Kohno Maestro
Feel free to ask me anything about Japanese classical guitars.