BSM HS - Treble boost
BSM Velvet RM - Treble boost
Used pedal made in Germany using germanium transistors, only used a few times, here is some information on the pedal, taken from the BSM website:
The BSM HS model is based on the British HORNBY-SKEWES unit produced between 1967 and 1969, as used by Ritchie Blackmore, the brilliant and impulsive guitarist of Deep Purple. The unit produces a powerful and biting sound that was used to help create the epochal masterpieces e.g. Deep Purple In Rock and Fireball.