50 Cents - Elizabeth II

The East Africa Currency Board was a colonial monetary authority jointly serving Kenya, Uganda, Tanganyika, and Zanzibar — an arrangement that became increasingly awkward as each territory moved toward independence in the early 1960s. Tanganyika left the common currency in 1966, Kenya and Uganda in 1967, effectively ending the Board's practical function before its formal dissolution.

The 1954 introduction of copper-nickel replaced the earlier silver-content issues, a shift driven by post-war metal economics rather than any reform agenda. KM#36 is sometimes found with die rust on later dates as mint quality controls loosened during the Board's administrative wind-down.