8-10W 2x8 combo with a 7591 output tube — a harmonica favourite.
Marks that can be entered for this maker: Transformer code.
Nothing predates 1950; 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 — premier