WelsonWeslon bass guitar headstock 1960s Welson were based in Castelfidardo in Italy ,making accordions and acoustics since the 20s and crazy electrics from the early 60s alongside Eko,  Crucianelli, Bartolini and Galanti.  Around 1967 Welson released a range of violin shaped guitars and basses using a new mini Humbucker.  The same range was marketed in the US under the Orpheum brand. [Source: eBay description ]

http://www.combo-organ.com/Welson/welson.htm

http://en.wikipedia.org/wiki/Welson

Welson catalogs

http://vintage.catalogs.free.fr/Index.htm

see Orpheum

Images eBay inc 1971-72 Welson  SG copy:Welson guitar Gibson SG copy