1956 Gibson J-200N
Gibson began manufacturing "super jumbo" flat top acoustics in 1937 as the SJ-200 at their Kalamazoo, Michigan factory. The guitar's name was changed in 1955 to the J-200. The "N" denotes a natural finish.
Elvis Presley famously used a 1956 Gibson J-200N. This guitar is the serial number that comes directly after Elvis's 1956 J-200 guitar, which is A22937.