CBK Radio > CBK Logos CBK LogosClick on the image for an enlarged view. Original Logo (1940-1958) Second Logo (1958-1974) Butterfly Logo (1966-1974) Gem Logo (1974-1986) Single Colour Gem Logo (1986-1992) Current Simplified Gem Logo (1992-present) Sources: Canadian Broadcasting Corporation; Wikipedia [Article on CBC]; Wikimedia Commons;Purpose of Use: To document the logos the CBC has used over the years.