Session was a British brand launched around 1979 which specialised in small solid state guitar amps - although they also made bass amps, and some other accessories.

Source: Award-Session website (15 September 2020)

The Shane musical instruments brand was launched in the early 1980s. By the late 1980s the range included acoustic, electric and classical guitars. By 1993 the brand name was no longer in use

Sources: Shane catalog 1989; Trademark records 1982 - 1993

Serlan guitars were made in Andalusia, Spain and distributed by Selmer in the early 1960s.

Source: 1963 Selmer Serlan catalog

Sekova was a brand name of U.S. Musical Merchandise Corp of New York who sold Sekova acoustic guitars. electric guitars, basses, folk instruments, amplifiers, effects and accessories in the 1960s and early 1970s.

Source: 1967 - 1973 Sekova catalogs

Screaming Eagle custom electric guitars are made north of Melbourne, Australia by Andrew Clarke and his daughter Naomi. Screaming Eagle guitars feature original designs, custom made hardware, figured woods - often using through-neck construction.

Source: Screaming Eagle Guitars website (10 September 2020)

ScoGo was the brand name of Scott Gordon who made custom handmade guitars from around 2001 to around 2008 in Parkesburg, Pennsylvania.

Source: ScoGo website (archived 2008)

Clarence Eric Schulte (1923 - 2015) grew up in Malvern, Pennsylvania and first became interested in guitars in the 1930s. Shulte served in World War II in an engineering unit and after the war worked as an auto mechanic. In the 1950s Shulte began customising guitars and the went on to start building them. He usually made copies of the iconic American designs - like the Fender telecaster, but in 1957 he launched his own Schulte Custom design - a single-cutaway semi-hollowbody.

In 1973, he was hired by Philadelphia Music to repair guitars. He also began making his own versions of the Les Paul. In the 1980s he made ES-175 style guitars for George Thorogood which became the Schulte Custom CES-135 TD model. By the 1990s Schulte was established as one of the top custom guitar builders on the East coast and he went on making guitars into the 2000s.

Founded by Jason Z. and Elizabeth Schroeder, as an offshoot of Schroder custom Guitars. As Jason's custom guitars gained popularity in the mid to late 2000s he became obsessed with finding the best parts he could  This led to him designing his own bridges: the Schroeder Original wraparound bridge is now one of the best bridges on the market. 

Source: Schroeder Guitars Hardware website (12 August 2020)

David Schramm makes classical and flamenco guitars. Active since at least the 1990s.

Source: Schramm guitars website (10 August 2020)