There were some traces of glue residue from a small rectangular sticker on the back of the headstock under this Quality Control sticker.
I fitted some new tuners because one of the originals had been replaced and one of the others was broken. I guess the block logo predates the script logo which was first used in 1978 according to US Trademark Office. I feel it was made in Korea but I'm not sure. Switch and pots are Japanese and the tailpiece is stamped Japan underneath.
Here's the model number on the neck plate.


