It is a JBL C36 type enclosure made by Shinko, which is rare. Combinations of D130, 175, etc. are possible, so please finish the bi-count to your liking. The appearance has line scratches, turns, and chips. (Satoshi Yonejima)
Accessories: Saran net, legs
Main specifications: Woofer opening 345 mm Screw pitch 370 mm Driver part 135 mm Screw pitch 164 mm W492 × H730 × D401 mm 21.7 kg (1 piece)