We call "Samurai Bass" the name of the Japanese bass that has been highly praised as "Japan Vintage", and the Japanese brand that has sublimely maintained the Nippon quality since the 1960s. The perfection of domestic basses made the greatest leap from the 1970s to the 1980s, and many "copy"...
tcgakki.com
A past Gakki ad, this one has the rounded FPM headstock and no apparent top wood, but it, too, was listed as an MHB. The only MHB ever listed in the TB Classifieds is as you say: hippie sandwich and streamlined headstock, plus snazzy white pickups and ornately-lettered truss-rod plate. I’m sure mine is an FPM as advertised.