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.
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
MOC-152147 M-109 PALADIN, 155mm Howitzer, 1/35 Scale Modern Military Model(1079PCS)
LEPIN KING XINGBAO MOULDKING DECOOL SY SEMBO bricks building blocks – Joy Bricks
Admiral Hipper Class Heavy Cruiser “Blücher“ Scale 1:300(1625PCS)
327 pcs MOC-140180 Ferrari SF90 Stradale – Joy Bricks
1800pcs MOC-66271 High Voltage Transformer (PDF instructions + digital model) – Joy Bricks
LEGO MOC 1:30 O-I, Japanese Super Heavy Tank by super_cacti
MOC – Joy Bricks
1673pcs MOC-99533 DESERT ORACLE mk 02 - Pacific Rim jaeger mech – Joy Bricks
MOC MILITARY SERIES – Joy Bricks
LEGO MOC 1:30 O-I, Japanese Super Heavy Tank by super_cacti
5391PCS MOC-144534 10305 Knight's Castle Modular Expansion – Joy Bricks