The narrow-panel tweed Bassman with four 10 in. speakers — the circuit that became the blueprint for British amps.
Marks that can be entered for this maker: Serial number (plate), Tube chart sticker, Transformer code, Speaker code, Pot code, Chassis stamp, Circuit code.
Nothing predates 1954; components only push the date later.
Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.
Evidence: Blue Book of Guitar Values — fender · Internet Archive (Wayback Machine) — snapshot of www.ampwares.com