The O-I was Japanese super heavy tank of the second world war. Whether or not an actual prototype was constructed of the massive 150 ton tank is not completely clear, but to this day a single track link still exists for the tank.
MOC-55856 1/30 O-I Japanese Army Tank Building Blocks with Motors, Super Heavy Tank Building Blocks MOC Set Compatible with Lego (1884PCS) : צעצועים ומשחקים
1884 pcs MOC-55856 1:30 O-I, Japanese Super Heavy Tank – Joy Bricks
MOC Bricks Archives
Oi tank 150t Takom 1:35 inbox
Japanese Super Heavy Tank O-I Oooki-I-Gou with RC - MOC 55856 (Speed Build Review)
Rambly 1/30 Tank Building Blocks, For Japanese Super Heavy Tank O-I, MOC- 55856, Tank Construction Kit WW 2, For Military Fans, Collectable MOC Set Toy, 1884 Pieces, 35.9 x 21.4 x 15.5 cm: : Toys
1867 pcs MOC-55859 1:30 O-I (DGB version), Japanese Super Heavy Tank – Joy Bricks
Japanese Super Heavy Tank O-I Oooki-I-Gou with RC - MOC 55856 (Speed Build Review)
MOC-55856 1/30 O-I Japanese Super Heavy Tank
LEGO MOC 1:30 O-I, Japanese Super Heavy Tank by super_cacti
1/350 MOC UCS USS Enterprise CVN-65 Nuclear-powered Aircraft Carrier