Biography. Nirvana was an American rock band that was formed by singer and guitarist Kurt Cobain and bassist Krist Novoselic in Aberdeen, Washington, in 1987. Nirvana went through a succession of drummers, the longest-lasting being Dave Grohl, who joined the band ...
A broadstruck coin, or broadstrike, is a piece struck outside the confines of the collar. The metal of the planchet was able to spread outward, beyond what is now considered a coinâs normal diameter, and, because no collar was present during striking, the coin lacks any special edge device, like reeding.
The level of purity varies from issue to issue. Three nines (99.9%) purity is common. The purest mass-produced bullion coins are in the Canadian Gold Maple Leaf series, which go up to 99.999% purity.