Here's were we go off the traditional beaten path and conventional wisdom.....It come to light in recent years that infact Meccano Ltd. did, either as a replacement or an addition to the blue cord everyone thought was prewar 1934-41. I came into possession in 2002, a mint unopened package of 12 #40 cords. When the package was opened, I discovered that the cord was infact green when I was expecting blue! The green is a mint or pastel shade of green very much lighter in shade than the darker one we are used to in the postwar period.