You don't see many Spira guitars around, which is why I share this, now expired listing on Reverb for the same model as mine, the S4 Jumbo, which could come in different wood choices (mine is "standard" rosewood with spruce top). A range of nice pictures as well. The description of the sound, although stated as translated from a Japanese site, is actually pretty good!
Jack Spira S4 guitar for sale (presumably sold). Now I have to get mine out of its case to be reacquainted with my fingers...