The US did not use domestic US coins for support of partisans - that would have meant immediate death if captured. The Army, OSS, and State Dept used silver and gold coins from local countries or that were in international circulation. Gold coins included sovereigns, Napoleons, Swiss and Italian -- even a few Canadian. Never US gold coins - they were not a normal part of pe-war exchange.
PS: Silver bullion was useless to locals. In the Philippines pre-war coins were used along with counterfeit Japanese occupation currency, and penicillin. If you want more information on recovery of Philippine coins, see Journal of Numismatic Research, Issue #3. Here's a short review from E-sylum of this section of the publication:
Silver Divers of Corregidor World War II: May to November 1942
After all the gold and some of the Philippine silver was smuggled out on the Trout a large quantity of silver coins remained. Just before the Philippine island of Corregidor fell to the Japanese, these silver coins were dumped in Manila Bay. It was hoped that the coins could thus be hidden from the invaders. The Japanese soon learned the location and conscripted American Navy divers to bring the money to the surface. This fascinating story of bravery and determination was unknown during the war and received little public attention afterward. It was not until one of the divers, Robert C. Sheats, published his private memento of captivity, One Man's War: Diving as a Guest of the Emperor, that the story gained much-deserved attention.