CANADA. Dollar, 2007. Ottawa Mint. NGC PROOF-70 Ultra Cameo.KM-655. Baby Rattle type. Mintage: 3,207. A <strong>SCARCE </strong>and elusive variety for the serious collector of Canadian coinage, this piece represents absolute perfection, with a deep cameo appeal and enticing frosted devices.From the Mayer Collection of Canadian NGC Registry Sets.