Five archaic bronze knife coins, Eastern Zhou dynasty, Warring States period | 東周戰國 齊國趙國刀幣一組五件

During the tumultuous Warring States period, the state of Qi minted a series of unique coins known as "Qi knives," infamous for their inscriptions and significance. One such notable series includes inscriptions such as "Qi Fa Hua Bei Gong," "Qi Zhi Fa Hua Bei Ri," "An Yang Zhi Fa Hua Bei Ri," and the particularly rare "Qi Fan Bang Chang Fa Hua," which translates to "Qi restores its state and prospers under the law."

These coins, commonly categorized by their inscriptions into three-character, four-character, five-character, and especially the six-character knives, were commemoratively minted following Qi's recovery and reconquest led by King Xiang. The Qi kingdom had been pushed towards extinction when in 284 BC, King Zhao of Yan overran Qi's capital at Linzi with his general Yue Yi. However, by 279 BC, after several strategic counterattacks orchestrated by military genius Tian Dan, Qi reclaimed its capital and sovereignty.

The "Qi Fan Bang Chang Fa Hua" knife money was introduced as part of this resurgence. It is considered by historians to be among the earliest examples of commemorative currency in China. The term "Chang" in the inscription, suggesting longevity or prosperity, is stylistically unique to the Warring States period and aids in the chronological identification of these coins. The phrase "Fa Hua," meaning legalized currency, underscores that these coins were formally recognized across Qi, with strict prohibitions against unauthorized minting.

The text layout of the "Qi Fan Bang Chang Fa Hua" knives is masterfully crafted, with each character centrally placed and proportioned for aesthetic harmony and readability. The knife's design embodies a balance of rigidity and finesse, perfectly aligning with the contours of the blade itself. On the reverse side, the design incorporates three parallel lines with a finely detailed "ten" and a robust "hundred" symbol below, adding structural and visual stability to the piece.

These six-character Qi knife coins are exceedingly rare. Noted numismatist Zhu Huo mentions in his work "New Dictionary of Ancient Coins" that of the 4,950 Qi knives unearthed in various locales throughout Shandong, only 16 were six-character blades. Representing a minuscule 0.3% of all Qi knives discovered, the majority are held in museum collections, and those available on the market are exceptionally scarce.

Due to their historical importance and rarity, six-character Qi knives are highly esteemed in the realm of numismatics, ranked among the top fifty prized ancient coins.

這組戰國齊「齊法化背工」「齊之法化背日」「安陽之法化背日」「齊返邦長法化背百」及趙「明刀背右工」，俗稱明刀、齊「三字刀、四字刀、五字刀、六字刀」，六字刀最為稀少，「返邦」，義即「復國」，當為齊襄王退燕復國後所鑄的貨幣。公元前284年，燕昭王派大將樂毅佔領齊都臨淄，齊國幾乎到了亡國的邊緣，後齊襄王在莒五年，養精蓄銳，生聚教訓，依靠田單的軍隊掃蕩燕軍餘孽，由莒重返都城臨淄（前279年），得以復國，為紀念這一重大歷史事件，遂鑄「齊返邦長法化」刀幣以為紀念，故多數學者認為此幣是中國最早的紀念幣。

第四字釋「長」，其字體結構僅見於戰國時期，是典型的戰國文字結構，具有斷代的尺規性作用。幣文中「法化」是「法貨」的初文，意為齊國國家法定的貨幣，行通天下，不准私人竊鑄。「齊返邦長法化」六字穩居刀身正中，字體大小適度，疏密適宜，文字線條與刀幣造型渾然呼應，剛柔相濟，極為和諧；背文三橫線緊密而偏上，中部「十」字較小，橫作粗點，下部「百」字飽滿、結體穩固而莊重。此品六字刀幣文直曲有度，結體優美，章法佈局堪稱六字刀幣中的極美品。

六字齊刀歷來出土及傳世極少，各類文獻所載個人或博物館收藏者也是寥寥。朱活先生曾在他的《古錢新典》中提到山東各地歷來出土的齊刀共32批次計4950枚，六字刀的僅見9次計16枚，只佔全部出土齊刀數量的0.3%，且絕大部分被博物館珍藏，可自由流通者更是稀見，其珍罕程度可見一斑。故而，六字齊刀在泉壇已久負盛譽，位列古泉五十名珍。