The modern shipping container was invented by trucking entrepreneur Malcom McLean in 1956, revolutionizing global trade by enabling efficient, intermodal transport of goods. It standardized cargo, dramatically reducing loading times and costs, which drove globalization. Standard ISO dimensions (20' and 40') were established in the late 1960s, replacing loose cargo methods..... It'll make sense 
Originally housing a small pencil this cache should be good to sign... but as always. Carry your tools. Quick Find here.
Well Done to Axell33 & leega305 & Cirrus_WA on group FTF on this one.
