|Headway||1977 to 2000s
|Headway guitars – Key dates sourced from Deviser website 2002 on internet archive.
1977 Headway started making acoustic guitars in Matsumotu, Japan
1981 Headway changed main products from acoustic to electric.
1991 Deviser founded in Matsumotu
2000 Headway starts making acoustics again
2001 Headway started Bacchus handmade series.
It appears that Deviser is the name of the sales and distribution company and Headway is the name of the factory.
Brand names include. Headway, Deviser, River Head basses, Bacchus electrics, Brian electric guitars and basses, Rider acoustics,
Headway guitar catalogs
http://www.t-shiga.com/sub7-5-1-15.htm [This link works on wayback machine]