4 doubles 1906, bronze, mintage - 52000 pcs only. "Ralph Heaton & Sons" Mint (Birmingham). Ruler: king Edward VII.
4 doubles 1945, bronze, mintage - 96000 pcs only. "Ralph Heaton & Sons" Mint (Birmingham). Ruler: king George VI.
Three pence 1959, copper-nickel, weight - 6,72 g., size - 21 mm, mintage - 500000 pcs. Engraver: Paul Vincze. Such coins were released at 1959 and 1966.
I don't know what happened to my pictures from June 13, 2010 so here they are: Guernsey 4 doubles 1906 Guernsey 8 doubles 1864 Guernsey 8 doubles 1959