kool koasters ... eh!
Molson

O'Keefe Party Coasters
They were likely a novelty giveaway at trade fairs & conferences
like the Carling & O'Keefe aluminum coaster sets.
My guess would be late Ontario 40's to 50s when brewery swag
was strictly controlled by the Ontario government. Info from Gordon Holder.
Coasters submitted by Don Kurtz, all 2 sided with various sizes and different colors (of the same coaster)


ON-MOL-759A


ON-MOL-759B


ON-MOL-759C


ON-MOL-759D


ON-MOL-759E


ON-MOL-759F


ON-MOL-759G


ON-MOL-759H


ON-MOL-759I


ON-MOL-759J


ON-MOL-759K


ON-MOL-759L