Madeira by Guild’s model designation uses a two (sometimes three) part alphanumeric system that includes a prefix, a series number and sometimes a suffix.
The prefix indicates the type of acoustical guitar: Determining the exact age of a Madeira by Guild guitar is difficult unless you have an original receipt.
The first generation had a Martin Style headstock with a flat top.
The second generation featured a rounded or curved top.
Most people overlook Madeira even though they are good quality.You can narrow down the age of an acoustic steel string by looking at the headstock.There are at least three basic headstock designs on Madeira steel string acoustics.The guitars were first made in Japan based on existing Guild designs. Kasuga was one of the oldest stringed instrument manufactures in Japan (open approx. The quality of guitars built by Kasuga was very good. Legend has it that the Japanese workshop used pre-machined materials that were made in the USA by Guild.There doesn’t seem to be a consensus regarding those assembled in Korea—maybe some used materials from the US, maybe not.
It is relatively certain Madeira was in production from the early ’70’s to early ’80’s.