[5] Rickenbacker serial numbers for solid body guitars made between September 1959 and October 1960 did not contain date code information.
Following the completion of a final few Combo 450 guitars in 1958, 400-series production would not resume until circa serial number 4C100, which is ascribed to September 1959.
[7] The most famous adopter of a 400-series Rickenbacker guitar remains George Harrison of The Beatles, who in 1963, bought a 1962 Model 425 serial #BH439 while on a trip to the USA.
Prior to taking delivery of the instrument, George had its finish changed from Fireglo to Jetglo.
[9] In 1971 Rickenbacker introduced the more modern 430, (followed by a prototype deluxe 470 model which never saw commercial release) though this line was dropped in 1982.