Re: S. yairi model 880 1976
: I have the same guitar that you have. Any information about it? All I know is that S. Yairi is related to K. Yairi either as a son or a cousin. And that S. Yairi guitars are better then K. Yairi guitars, but K. Yairi's were more known coz S. Yairi started his own after. If you have any information about how much it cost please contact me.
Sadao Yairi was Kazuo Yairi's Uncle. Whether his guitars or Kazuo's are best, should be left to an individual preference after playing equal models of each luthier.
Your info is mostly incorrect, Sadao started his company in 1932 after leaving his job at Suzuki Violin. Kazuo didn't take over his Father's business until the early 1960's.
The 880 is just above mid level of the S. Yairi models. Solid Spruce top, with Rosewood Laminates on the back and sides. Generally (of course depending on condition) go for between $475 and $650 on EBay.