brands

type	origin	year	neck	construction	headstock	zero fret	trussrod
	Japan	late 60's, early 70's	bolt on	violin	wave	yes	yes
notes: only two switches, trussrod accessible from bodyside

type	origin	year	neck	construction	headstock	zero fret	trussrod
	Japan	70's	bolt on	violin	wave	no	yes
notes: final version, most Hofner like

type	origin	year	neck	construction	headstock	zero fret	trussrod
	Japan	late 60's	bolt on	violin with single f-hole	symmetrical round ('spade')	no	yes
notes: Depending on the year varying trussrod cover, tailpiece, tuning knobs etc. Similar to Domino, Conqueror