CH 1937 Stamp Day Geneva GE, post card with additional red cancellation UPG (forerunner)

Switzerland 1937 Stamp Day Geneva GE - UPG,
post card cancelled "10.01.1937 Geneve Exp. Lett." and with additional red cancellation "Journeé de timbre poste UPG" with Rosette,
with Pro Juventute stamp, forerunner Stamp Day, TOP rarity, luxury conservation.