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  2. Countermarked yen ("Gin") - Wikipedia

    en.wikipedia.org/wiki/Countermarked_yen_("Gin")

    [4] [5] The mark was put in place by the Japanese mints at Osaka and Tokyo to identify these coins as simply bullion. Those that were stamped on the left originated from Osaka, while those on the right were from Tokyo. By placing this mark the Japanese government prevented these coins from being sold back to them at a later date for gold. [5]

  3. Chop marks on coins - Wikipedia

    en.wikipedia.org/wiki/Chop_marks_on_coins

    Chop marks were also used on copper-alloy U.K. Large Pennies, U.S. Large Cents and other copper coins of Europe, Central, South and North America and have Hindu, Chinese, Japanese and Arabic nation's chopmarks as well as English alphabet chop marks from British and American Merchants in Hong Kong from the 1830s to 1960s when world silver coins ...

  4. Silver hallmarks - Wikipedia

    en.wikipedia.org/wiki/Silver_hallmarks

    A silver object that is to be sold commercially is, in most countries, stamped with one or more silver hallmarks indicating the purity of the silver, the mark of the manufacturer or silversmith, and other (optional) markings to indicate the date of manufacture and additional information about the piece.

  5. 1 yen coin - Wikipedia

    en.wikipedia.org/wiki/1_yen_coin

    The first Japanese one-yen coins were minted between 1871 and 1872 using both silver and gold alloys. [1] [2] This came at a time when a new decimal system was put into place, and a modern mint was established at Osaka.

  6. List of Japanese coinage patterns - Wikipedia

    en.wikipedia.org/wiki/List_of_Japanese_coinage...

    The design for this pattern is unknown, it was struck in silver. [83] 20 Sen 8th 八 1919 KM-Pn51 The design for this pattern is unknown, it was struck in silver. [84] 20 Sen 10th 十 1921 KM-Pn54 The design for this pattern is similar to KM-Pn46, and is also counter stamped "mihon" (specimen). Both of these patterns are described as "very rare".

  7. 100 yen coin - Wikipedia

    en.wikipedia.org/wiki/100_yen_coin

    The 100 yen coin (百円硬貨, Hyaku-en kōka) is a denomination of Japanese yen. These coins were first minted in 1957 using a silver alloy, before the current design was adopted with an alloy change in 1967. [1] It is the second-highest denomination coin in Japan, after the 500 yen coin.

  8. Trade dollar - Wikipedia

    en.wikipedia.org/wiki/Trade_dollar

    When Japan introduced the gold standard in 1897, the silver 1 yen coins, including the trade dollars, were demonetized. The majority of the trade dollars were counterstamped with the character "gin" (Japanese for "silver"). The Osaka mint placed the mark on the left side of the reverse, the Tokyo mint on the right.

  9. Japanese mon (currency) - Wikipedia

    en.wikipedia.org/wiki/Japanese_mon_(currency)

    The mon was the currency of Japan from the Muromachi period in 1336 until the early Meiji period in 1870. It co-circulated with the new sen until 1891. Throughout Japanese history, there were many styles of currency of many shapes, styles, designs, sizes and materials, including gold, silver, bronze, etc.