by Liu Yuante on Fri Jun 02, 2006 3:59 am
Ok, history time. Let's start with the cowrie since it is probably the earliest.
In extremely ancient times in China cowrie shells were used as one form of currency. This practice probably predates the Shang dynasty and may stretch back into the 3rd milennium B.C. In the very earliest times actual cowrie shells were used, often with the backs filed away so that they could be strung together. As society became more organized and centralized, not to mention practical, they began manufacturing their own currency in the shape of cowries. The earliest ones were carved from stone, crudely at first and using mostly sandstone and alabaster, then over time being carved from other stones such as jade, soapstone and mother of pearl. There is no real strict progression here, probably different types were carved from different stone types in many overlapping periods. Later cowrie imitations were carved from bone and also were made from clay. By the time of the Warring States period they were making cowrie imitations from cast bronze and eventually they evolved into the ant nose and ghost face money.
Most likely this piece dates from the Spring & Autumn period, c. 600 B.C. The holes do not go all the way through, meaning it could not have been strung. Some pieces are like this, and I have also seen ancient 'ring money' with incomplete center holes. Possibly the carver didn't bother, possibly it wasn't meant to be strung (grave offering?).
Moving on to the Ban Liang, this type of coin was one of the early round coins with square center holes. The Yuan coin of much earlier had a round hole, and there were also some other early square-hole coins, such as the Yi Dao. Speaking of the Yi Dao, I was incorrect when I stated that it unusually was read from left to right. I had gotten this idea into my head from seeing some specimens that were cast incorrectly, i.e. backwards. They read right-to-left, just as with everything else Chinese.
Anyway, the Ban Liang probably became uber-prominent over other coins of the time because of where it was minted - the state of Qin. They began to be cast in the early 4th-century B.C., approx. 390-380 B.C. As mentioned earlier, as time wore on they became smaller and lighter. Generally speaking, any Ban Liang 32 mm or greater in diameter and greater than 10 g in weight are pre-unification Qin state coins. During the last years of the Qin dynasty (such as it was) the coins had come down to about 6-8 g in weight on average and about 30-32 mm in diameter. This weight and diameter continued, on average, into Han during the reign of Emperor Gaozu of Han, Liu Bang. During the regency of Empress Gao they became smaller and lighter and gradually came down in size to as small as 20-22 mm and 2-3 g in the decades that followed. Finally, around 140 B.C., soon after the ascension of Emperor Wu, the Ban Liang was discontinued and the minting of the Wu Zhu was begun.
That is a nice, neat little history and so of course it can't be entirely true. There were local mints throughout the state of Qin and in China as a whole after the unification of the country under the First Emperor of Qin. These local mints often made variant Ban Liangs that might, say, be 33 mm in diameter but only weigh 4 or 5 g. Diameter is usually a good guide through these. If it is light but big it is probably not a Western Han Ban Liang from after the reign of Liu Bang. The transition period of the final years of Qin through the reign of Liu Bang are pretty much impossible to seperate so far as Ban Liang sizes and weights. Generally speaking, if the coin is under 30 mm in diameter it is definitely a Western Han issue. It is important to note that these figures are most trustworthy when dealing with averages - individual coins could vary somewhat.
There is also an alternate series of attributions proposed by Wai San Doo based on archeological evidence, stating that the primary classification should be weight, followed by size. In this way 20-10g, 28-34 mm are mid-Warring States, 8.5-7.5 g and 28-29 mm are late Warring States, 6.4 g and 22 mm Qin, 3-4 g and 22 mm Qin counterfeits and early Western Han, anything smaller Western Han.
The Warring States Ban Liang shown is 32 mm and 11.5 g, making it one of the earliest, dating somewhere between, say, 380-330 B.C by either attribution method. The Western Han Ban Liang shown is 33 mm but only 6.5 g. It is possible it is a pre-unification local variety from Qin state or an anomalously large coin from the same period according to Doo's attributions, or an anomalously small coin from 390-380 B.C. but given that the former attribution method accomodates for coins as big as early types but not as heavy, I agree with the dealer's attribution of Western Han (reign of Liu Bang only), though it could also be late Qin.
Wu Zhu info will come later, as it is at least as involved as all of this and I've done enough typing for one night.
Adrian
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