The Gibson Custom Line (CL) Series was an acoustic guitar range introduced in the 1990s and made in Bozeman, Montana. The CLs had a longer scale length than the typical Gibson acoustic guitar and were designed by Ren Ferguson to compete with Martin D28 style acoustics which were hugely popular with guitarists. There were 5 tiers of CL guitars ranging from the CL-10 to CL-50. All had abalone rosettes (not really used by Gibson before on a production model), custom pickguard shapes and the more expensive models had mother of pearl snowflake or special leaf fingerboard inlays.