DESCRIPTION:
Clarence White - 1954 Telecaster B-Bender "Buckaroo" Practice - 1967
That Telecaster guitar is not pictured , rather a Martin dreadnought style which he also played. audio excerpt edit: Gene Presler 2014

The B-Bender guitar was invented in 1967 by musicians Gene Parsons and Clarence White of Nashville West and The Byrds. The device was originally called the Parsons/White Pull-String, later renamed the StringBender, and is now best known as the B-Bender. Early prototypes developed by Parsons (a machinist as well as a drummer) included multiple bending devices for the E, B, G and D strings, but guitarist White decided he preferred a single B string bender in the final design. The B string is bent up a full tone by pulling the guitar neck down. This puts pressure on the strap, which is attached to a spring-loaded lever at the base of the neck. The lever arm passes through the body of the guitar and was connected to the B string behind the bridge of White's 1954 Telecaster