El Salvador
Republic gilt-brass 4-Piece NGC-Certified Off-Metal Pattern "Independence Sesquicentennial" Proof Set 1971,
1) 25 Colones - PR66 Ultra Cameo NGC, cf. KM143
2) 50 Colones - PR67 Ultra Cameo NGC, cf. KM144
3) 100 Colones - PR66 Ultra Cameo NGC, cf. KM145
4) 200 Colones - PR67 Ultra Cameo NGC, cf. KM146
cf. KM-PS5. A charming set of off-metal trials for the standard gold issues. While the mintages are unknown, it's certain that very few were struck.
Ex. Richard Stuart Collection
HID02901242017
Estimate: 2000-3000 USD