50 Pounds - Elizabeth II British Pound Sterling

Gibraltar's early gold issues of the mid-1970s were produced as the territory's constitutional status was under active renegotiation with Britain — Spain had closed the land border in 1969 and it would remain shut until 1982. The 1975 date places this coin squarely in that period of isolation, when Gibraltar was leaning hard into expressions of British Crown loyalty, and commemorative gold was one vehicle for doing so.

The specification — 15.55 g at .917 fine — mirrors exactly a half-sovereign weight standard scaled to the 22-carat alloy, a deliberate nod to sovereign series conventions.