The 633 was first listed in 1965, and was the first
"Dreadnought" size guitar to be offered by Sears. It had a few different pickguards, a few different logos and model numbers, but remained the big daddy
JUMBO guitar for its entire run. It was a popular guitar, with a big sound that
came from its obviously (and well-touted in the catalogs) larger size, and a
ladder bracing scheme for its spruce top.
Introduced:
Fall/Winter 1965
Changed to 57H1220L in Fall/Winter 1968
Changed to 57H1221L in Spring/Summer 1970
Retired:
As the 1221 in 1973