The development of shipping containers reached a turning point in the late 1970s when standardization began to take place. Prior to this time numerous designs and sizes of containers were seen throughout the world. The true intermodal era began in the 1980s with the expanding world economy, Panama Canal ship size restrictions, intermodal railway car (wagon) designs and the setting of ISO standards for international shipping containers.
Prototypically accurate "beveled" all corrugated sides
Production rail guides and roof corner pads
Vent types (standard or flat) and positioning as per the prototype