The 1301 was the less expensive of the Silvertone offerings in the late '40s. Less powerful, less umm... attractive than the 1300, but the same overall design, but not as refined, well-spec'd or decorative as the 1300, check out the amp chassis for the most direct similarity to the 1300.
Fall/Winter 1947 at $47.50 as the 57K1301
Through its career, it was also 57X1301
Spring/Summer 1950 at $34.95 as the 57D1301
The hallmark of the 1301 was its 'walrus-tooth' speaker protection system; two simple wooden bars tacked in place. The handle design also seemed to evolve over the short life of this amp. Some had the flared-end leather handle, while some relied on a pinned bracket to keep the handle handy.