Update:
I contacted City Music in Singapore, which carries a line of guitars under their house brand, "Craftsman," and which also has a script/logo on their headstocks.
However, their script/logo is different from the one on my T-bird, here's mine:
https://www.dropbox.com/s/axi8ponamdcydtg/IMG_3773.jpg?dl=0And here's theirs:
https://www.dropbox.com/s/prpqo9k671tr9eb/City_Music_Craftsman_logo.png?dl=0Apparently this was a coincidence. City Music says they started their Craftsman line about 20 years ago, so they could not have been marketing a Craftsman T-bird that looks exactly like a Washburn T-bird around 1982 to 1984.
But I have seen the same logo on two other instruments:
On an acoustic based on the Martin D 35, owned by a guy in Ireland who bought it around 1982 from a guy who bought it used from a shop in London
https://www.dropbox.com/s/4hzzhn1w2o3rqj2/Acoustic_Craftsman.jpg?dl=0This one came from acousticguitarforum.com and had two responses (copied with their spelling mistakes):
Source: Guitar Bluebook
Instruments previously produced in Japan between the late 1970s and mid-1980s. Craftsman built entry level to medium quality copies of American designs.
Craftsman. Previuosly produced in Japan during the late 1070s through mid-1980s. "The Guru's Guitar Guide" by Tony Bacon and Paul Day.The other place the same logo showed up was on a headless 1980s bass, which also included the "The Guru's Guitar Guide" reference.
https://www.adverts.ie/electric-basses/headless-80-s-bass-guitar-jap/9467375Thank you to the folks who sent me messages with ideas.
Do you know anything else about a Japanese guitar company called Craftsman?
The search goes on.