A clone of the Hornby Skewes Treble Booster with original TI 2N4061 loaded circuit on cloned PCB amp-top treble boost in the same vein as the Rangemaster.
Favored by Ritchie Blackmore (Deep purple) the circuit later found its way into the Hornby Skewes Shatterbox as the boost section used by Marc Bolan.
