Sunn used only a few basic cabinets. The workhorse was the 200S cabinet, which was adapted to many internal configurations. Two 15"s, four 12"s, and one 15" and a horn in the 60's, then later six 10"s, six 12"s, three 12"s, and a different take on two 15"s. All had the same outer dimensions: 40" high (42" with casters), 24" wide, 15" deep. If the 1972 catalog listed it at 42.5" tall, I think they must have gone to slightly larger casters.