Solid nickel to holed cupronickel

Postwar 50 Yen Transition

Connect the large solid-nickel 1955 type to the 1959 holed nickel type and the smaller 1967 cupronickel current family.

戦後五十円貨幣

Context

Historical and monetary setting

All three regular generations use chrysanthemum imagery, but size, mass, hole, and alloy define major type boundaries.

Identification

Do not use the flower alone: verify 25 versus 21 mm diameter, 5.5, 5.0, or 4.0 g mass, hole diameter, and nickel versus cupronickel.

Evidence boundary

The current 1967 type links to, but is not duplicated from, the current-circulation canonical page.

Series	Production	Legal issue	Material	Edge	Successor
No-Hole 50 Yen Nickel	1955	1955	nickel	reeded	jp-p6-series-50-yen-holed-nickel
Holed 50 Yen Nickel	1959	1959	nickel	plain	jp-current-50-yen-cupronickel

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Evidence

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

Regular coins list Ministry of Finance, Japan

Current and older valid 1-, 5-, 10-, 50-, and 100-yen design generations and official dimensions.

Open source

Coins from the Meiji era onward Bank of Japan Currency Museum

Official specifications, first-issue years, legal-expiry dates, wartime and postwar regular types.

Open source

Coin FAQ Japan Mint

Obverse/reverse convention, unissued ceramic status, postwar brass scrap composition, edge changes, and later silver-to-cupronickel transition.

Open source