It was not properly set up ; at least as far as classic commemoratives were concerned. A 144 piece set should have been numbered 1 through 144. Instead, they wound up with hieroglyphics like "9H" etc. Clumsy and disorderly. Mixing numerals and alphabet is non compus mentus. Leave that for algebra, not catalogue purposes. No wonder it failed to catch on.
Edited by freddo30
08/15/2020 1:08 pm