1946 Philadelphia Mint Silver Ingot. 27.81 Ounces. Type Three Hallmark, distinguished by the non-abbreviated word PHILADELPHIA and two stars, one located under each wingtip. This hallmark has been found on ingots from 1946 and 1956. According to Ken Conaway's Silver Ingots website, "These ingots in the 20 oz to 30 oz class are also the most consistent with stampings." This particular ingot is the exception. The hallmark is rotated, positioned too high, and 999 was stamped over it, even more unusual since it is from Melt Number 10 that usually show the imprints positioned perfectly. Ingots from Philadelphia in this weight class are about twice as scarce as those in the 5 to 10-ounce class. The top side is laid out: 1946 / NO. 171 / OZS 27.81 / FINE / 999 / mint hallmark. The surfaces are original with even blue-gray patina throughout.