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The very first four mon coins, issued in 1768, had 21 waves on the reverse. Later four mon coins, all with 11 waves on the reverse, can be dated by the type and color of the metal. Meiwa-sen, brassy alloy (68% copper, 24% zinc, and 8% tin), was used for the first 11 wave issue, 1769 - 1788. Bunsei-sen, reddish alloy (75% copper, 15% zinc, and 10% lead), was used for the second issue, 1821 - 1825. Ansei-sen, dark alloy (65% copper, 15% zinc, and 20% lead), was used for the third issue, 1857 - 1859. After 1866, all four mon coins were cast in iron.JA87037. Brass 4 mon, New Kanei, Meiwa-sen (brassy alloy); Hartill EJC 4.252 or 4.253; Ogawa 329 or 332; Krause C 4.2, weight c. 4.88 g, maximum diameter c. 28 mm, die axis 0o, Musashi Province, Edo, Fukagawa mint, 1769 - 1788; obverse kan ei tsu ho (universal treasure of Kwan Ei); reverse 11 waves; VF or better, quality and patina may vary, minor bumps and scratches, similar to the coins in the photograph, ONE COIN; $7.00 (Ä6.16)
Japan, Kanei Tsuho, Edo Period, 1603 - 1868
In 1636, the Tokugawa shogunate introduced Kanei Tsuho coins to standardize copper coins and maintain a sufficient coin supply. These coins, the first government minted copper coins in 700 years, became the daily currency used for small payments. Although the Kanei era ended in 1643, coins continued to bear the Kanei Tsuho legend for 230 years. By the 1650s, 16 private mints were opened across Japan. The shogunate outsourced the mintage to regional and local merchants who cast them at varying weights and sizes, as well as occasionally having local mint marks. Kanei Tsuho produced before 1668, referred to as "old Kanei" coins, are recognizable by their consistent calligraphic style. Kanei Tsuho coins produced after 1668, "new Kanei" coins, have more diverse calligraphic styles. From 1738 government authorized iron Kanei Tsuho 1 mon coins, and in 1866 iron 4 mon Kanei Tsuho were authorized.JA87039. Copper 1 mon, Hartill EJC 4.1 - 4.219; SCWC KM 5 (1606), weight c. 2.8 g, maximum diameter c. 23 mm, c. 1636 - 1868; obverse kan ei tsu ho (universal treasure of Kwan Ei); reverse plain; many varieties in the lot, near VF or better, quality and patina varies, some with minor flaws, bumps, scratches, encrustations, similar to the coins in the photograph, ONE COIN; $4.00 (Ä3.52)
Japan, Kanei Tsuho, Edo Period, 1603 - 1868
Unpublished in Hartill or Jones Kanei. Jones includes 254 Kanei Tsuho varieties, not all the known varieties, but all the major varieties are listed.JA87073. Copper 1 mon, Fuchi-sen (unknown origin); New Kanei; Hartill EJC -, Jones Kanei -, aF, kan obscured, encrustations, some crorrosion, weight 2.079 g, maximum diameter 21.7 mm, uncertain mint, c. 1668 - 1738; obverse kan ei tsu ho; kan obscured; very unusual ei with S shaped curving right arm, hooked head, no hooks on feet, and large cursive dot; tsu with square open head, cursive dot, and drooping head on the radical; ho unremarkable; reverse plain; perhaps rare(?); SOLD
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