Analysis of information sources in references of the Wikipedia article "Gibson L-5" in English language version.
... the next dramatic development was in 1934. ... It was at this time that the advanced model appeared. The L5 Advanced Model, now with a 17" body, and extra power was consolidated as the most accepted working guitar in the dance halls of the period.
Lee Ritenour L-5 Signature (2003-current) Single-cut archtop, rounded horn, scaled-down L-5 As L-5 Signature with floating pickup, TP-6 fine-tune tailpiece. • 1 floating mini-humbucking pickup (some with ...
Joe Spann...Spann's Guide to Gibson...I conclude that Maybelle's guitar was shipped in January of 1930.
The example pictured here was entered into Gibson's ledgers in April 1935 (serial number 91809) qualifying it as one of the first two Super 400 guitars to be delivered by the Gibson factory (it is the earliest surviving example known at this time). / The label reads Deluxe at the top and L-5 for the model while the deco-shaped black truss rod cover is engraved Super L-5. Unlike later production examples the tailpiece is not engraved with the Super 400 legend – though the heel displays the words Super 400. ....
Joe Spann...Spann's Guide to Gibson...I conclude that Maybelle's guitar was shipped in January of 1930.
The example pictured here was entered into Gibson's ledgers in April 1935 (serial number 91809) qualifying it as one of the first two Super 400 guitars to be delivered by the Gibson factory (it is the earliest surviving example known at this time). / The label reads Deluxe at the top and L-5 for the model while the deco-shaped black truss rod cover is engraved Super L-5. Unlike later production examples the tailpiece is not engraved with the Super 400 legend – though the heel displays the words Super 400. ....