The following is a limited series of only 50 Units worldwide, each of which are detailed replicas of the original Tone Bender including carbon composition resistors, erofilm capacitors and hand applied font/lettering, please find detailed specifications as follows: Grey Hammerite Casing, Hand Applied Silk Screening, Correct period Specification, 3 x OC81D Transistors, Hand Signed & Numbered by builder, Unique Anniversary Backplate, Limited Edition Certificate, Wooden 50th Anniversary Display Box, Historical Booklet outlining the development and creation of the Tonebender from 1965, Tonebender Gold Script Badge.