“The 1990s Colorsound Tone Bender reissue — it was the first time of reissue since
the original 70s run. These early 90s models were made in London
Macaris — the original Colorsound manufacturer. Transistors
are three BC549s.”
These are 1990s reissues apparently based on the original 1976 version of this effect. There seems to be some confusion on the reissues so feel free to add comments in the Disqus section to help clear things up.