The Classic 150 monoblock - 150 W of valve power in a 50 kg chassis, sold at ¥2.08 million in Japan.
Valve equipment: 400-500 V is present on the plates and stored in the supply after switch-off. ARC units are valve-matched at the factory - replacement sets must be bought as matched quads/pairs.
Marks that can be entered for this maker: Model / catalogue number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code.
Nothing predates 1989; 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: Audio Heritage (JP) — period catalogue sheets · HiFi Shark — live listings aggregator