Diamond-S: Informations

Diamond-S is a brand created by John and Danny Sturgill in 1975 in the US. Sons of David Sturgill, who bought Micro-Frets assets around 1975 (after Micro-Frets closed down, due to the death of its founder), they used left-over Micro-Frets and Harptone guitars parts to create solid body guitars sold under the Diamond-S brand.
It didn't catch well, and the brand disappeared around 1976.