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Representative transition issue

Ansei Nibukin

Rectangular two-bu gold from the late Tokugawa declared-value system.

安政二分金

Obverse of an exact documented Ansei Nibukin. Reverse of an exact documented Ansei Nibukin.
As6673 · CC BY-SA 3.0 · via Wikimedia Commons · approved precise-object cleanup and deterministic derivative preparation. · Exact documented Ansei Nibukin with its rectangular form preserved.
Date
1856–1860
Denomination
2 bu
Form
rectangular
Local status
Published

Context

Historical and monetary setting

It precedes the lower-fineness Man’en Nibukin and remains a Tokugawa issue.

Identification

How to classify the evidence

Preserve the rectangular form and compare inscription, punches, dimensions, mass, and metal.

Evidence boundary

What this page does not claim

The installed exact pair retains the rectangular form; no round crop or neighboring rectangular issue is substituted.

Issue evidence

Specifications and date record

Display date
1856–1860
Mass
—
Catalog fineness
57%
Edge
—
Image status
cleared exact pair
Identity confidence
high

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Related transition references

Ansei and Man’en RecoinagesBakumatsu and Early Meiji CoinageForeign Silver in JapanNew Currency Act of 1871Early Meiji Gold CoinageEarly Meiji Silver CoinageEarly Meiji Copper and Bronze CoinageJapanese era-date guide

Evidence

Sources and scope

These links support the claims on this page. Source authority does not imply permission to republish source images.

Late Tokugawa coin display records Bank of Japan Currency Museum

Museum catalog fineness values for Ansei and Man’en gold and silver issues.

Open source