Drafting Scale-Direct from a defunct Industrial Arts class room is a P 232 AES 12" drafting scale/rule marked Hearlihy, P 232 AES, Architect,  Made in Germany, US Std.  In new & unused condition.  Looks to be made of an acrylic material.   43 pieces available, offered as each.  There is an original box that would ship with 10 or more.