World Flip Federation > Slammers
Info:This slammer probably accompanied the Football Technik World Flip Federation caps produced by Plascot. On one side it has an image of a football, and has a patent number of 3744235. Looking up this patent number, it appears to be a 1971 patent for a "Timepiece indicating time by generated images in sets".
The other side has a picture of a person with a pointy ear and baring their teeth. Round the edge it says "High performance slammer". The slammer is constructed of single colour moulded plastic, and has dimples round the edge rather than being a plain circle.
Sorry, we don't currently have any data on which countries this set was available to.