有趣的一组坯饼钱币95枚一组 PCGS MS

有趣的一组坯饼钱币一组。95枚一组，含81枚不同款式和14枚重复款。有趣的一组坯饼组合，可能是由上海铸币厰总工程师Clifford Hewitt定制，由费城铸币厰总雕刻师John R. Sinnock製作，成品极有可能运回上海由Clifford Hewitt检閲。製作坯饼的金属及合金包括：纯镍、纯铜、铜镍合金、银铜合金、铜锌合金、铜铁合金、镍铁合金、铜锌锡合金、银铜锡合金、铜银镍锡合金。这些坯饼又可按加工程度分为I型全未加工和II型边齿有加工两种。组合包括：4枚铜锌锡合金II型坯饼，正反面均有同心圆图案，边齿有槽；8枚空白坯饼，合金成分以墨水写于表面，其中6枚I型及2枚II型带孔；5枚上有书写痕迹，其中2枚I型，3枚II型；28枚有孔，其中3枚I型，25枚II型；50枚完全空白坯饼，其中29枚I型，21枚II型。根据重量、大小及合金组成，可推测这些坯饼应是为一分、半分及1/4分而製。值得深入研究的一套拍品，多数有包浆，包浆程度不一，均获PCGS评级，配Clifford Hewitt手写信封。
PCGS MS-60 Secure Holder to MS-64 BN Secure Holder.

From the Q. David Bowers Collection.Ex: R. B. White.Ex: Estate of Clifford Hewitt.For more information about Clifford Hewitt, his works and a portion of his estate visit the American Numismatic Societies website http://numismatics.org/archives/ark:/53695/nnan0061.CHINA. Blank & Experiment Gold Standard Planchets, ca. 1920-34.15.51-37.58 mm; 1.12-25.51 gms. Approximately 95 pieces in lot, 81 all different with 14 duplicates. An interesting assortment of varying compositions and diameters probably prepared at the Philadelphia mint under the direction of Chief Engraver John R. Sinnock to the specifications of Chief Mechanical engineer Clifford Hewitt of the Shanghai mint. After they were prepared they were most likely sent to Hewitt for examination in Shanghai. The alloy compositions include pure Nickel, pure Copper, Copper-Nickel, Silver-Copper, Copper-Zinc, Iron-Copper, Nickel-Iron, Copper-Zinc-Tin, Silver-Copper-Tin and Copper-Silver-Nickel-Zinc. These planchets can be further categorized as Type I, raw planchets, and Type II, with upset rim or other edge device. There are four(4) Copper-Zinc-Tin planchets that have a series of concentric circles on both obverse and reverse, all would be considered Type II as they have a grooved edge. There are eight(8) blank planchets with the composition written in India ink, six(6) solid Type I and two(2) with holes Type II. There are five(5) with some sort of inscription on them, two(2) type I and three(3) type II. There are twenty-eight(28) with holes, three(3) type I and twenty five(25) type II. There are fifty(50) completely blank planchets, twenty-nine(29) Type I and twenty-one(21) Type II. Based on the planchet weight, diameter and composition these were probably for one Cent, 1/2 Cent and 1/4 Cent denominations. Very interesting and fully worthy of further in depth research. Includes Hewitts hand written envelopes. Most are toned to one degree or another. All are graded by PCGS.