This is a Christmas postcard promoting Tom Kuhn's line of high-end yo-yos including the Pocket Rocket, Roller Woody, Silver Bullet, and No Jive. Notice on the back that there is also some very neat information promoting other products.
This is a great example of early Tom Kuhn direct marketing. For many years the main way for many people to buy Tom Kuhn yo-yos was through their mail-order shop located just off of Haight and Ashbury in San Francisco.