Microfrets (or Micro-Frets) was a small company located in Myersville, Maryland, founded by Ralph S. Jones, Sr., in 1967. The company was active from
1967 to 1975, then again briefly in 2004-2005. They produced professional-quality guitars and basses with Bill Lawrence-designed
Note: apparently, each model (listed below) also comes in one of four different body styles (designated 1, 1.5, 2, and 3). So, one
can have a Calibra style 1, which is different from a Calibra style 3.