This is a 2" VCOA cog. This cog is cute and small and has two holes for mouting to your scooter or a cog display bar or an award if you would like.  Done in the world club palette kind of that sea foam green the Vespa uses in their marketing. Cog is 1/8" thick. Only 100 Made.  

2" VCOA cog world club palette with mounting holes