1 Peso Small heading

Mountain Province was one of several Philippine provincial governments that issued emergency guerrilla currency during the Japanese occupation — but its notes occupy a distinct position in that story. Unlike many provincial issues that operated covertly, Mountain Province administration maintained a degree of functioning civil government in the Cordillera highlands, partly because Japanese control over the interior was never complete.

The "Small heading" designation distinguishes this variety from a parallel issue with a larger typeface on the same line — a subtle difference that matters considerably to completists, as the two types were likely produced in separate print runs under difficult wartime conditions with inconsistent materials.