I've a Tapecorder M-4 spring-wound, 5" reel tape recorder made by Tokyo
Tsushin Kogyo, LTD, "Made in Japan" Serial 385.
I'm planning to sell it and am trying to find out what I can about it.
The company was the earlier name used by SONY. The nameplate is in English.
The similar looking M-1 was released in 1951. There are pictures of it and
the M-5 on line.
This item has a label added, "U.S. Information Agency."
I'd like to know what years the M-4 was available.
I can't find a sale record for any of these models and am thus unsure how to
Any helpful suggestions welcomed.