Daf Yomi - Sukkah 34 - Hadasim, Aravos, and Bar Kochba Coins

Whereas the Lulav of the First Revolt includes many twigs of willow and myrtle, the Lulav of the Second Revolt has just one twig of each. Was there a reason for this or was it just a whim of the engraver?

See here for a fascinating explanation.