The latest version is the three types of one dollar ($1) Hong Kong copper-nickel coins under the sovereign of Queen Elizabeth II showing her young to old age.
The mintage of the $1 coinage under Queen Elizabeth II is as follows:
1960H-40million;1960KN-40million;1970H-15million ( all with reeded, security edges)
1971H-8m;1972-20m;1973-8.125m;1974-26m and 1975-22.5m ( all with reeded edge)
Note that 1960H as a die variety without security edge(freak)
1978-120m;1979-104m and 1980-100m
1987-(unknown mintage) and 1988( unknown mintage)