This is a curious guitar. After doing a bunch of research, I have found that it was probably made in Japan for resale in Japan somewhere around 1974. The following website has some good information about these guitars and when they were made.
As long as I've had it, It has never been restrung, set up, or taken in for service. It was a utilitarian guitar for noodling purposes only but it has always been great for that. The item "Yamaha FG-75 1970's acoustic guitar Made in Japan" is in sale since Friday, January 10, 2020. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Acoustic Guitars". The seller is "winter_born" and is located in Atlanta, Georgia.This item can be shipped worldwide.