100 Patacas Grand Prix, Obverse Trial

Trial pieces for Macau's annual Grand Prix commemorative series were produced in small numbers to test plating adhesion and die alignment before the approved strikes were authorized. The gold-plated brass format was used specifically for circulation-grade trials, allowing the Imprensa Nacional to evaluate surface behavior of the plating under press pressure without committing to precious metal blanks.

The 1988 Grand Prix marked the 35th running of the Macau event, by then firmly established on the FIA calendar as the only street circuit race open to both Formula 3 and touring car classes simultaneously.