Representative issue study
Showa 30 (1955) No-Hole 50 Yen Nickel
The large no-hole nickel type precedes both holed nickel and modern cupronickel families.
昭和三十年無孔五十円ニッケル貨
- Date
- 昭和三十年 (1955)
- Denomination
- 50 Yen
- Material
- nickel
- Issue class
- postwar-transitional
Context
Historical and monetary setting
The denomination changed hole, mass, size, and alloy over subsequent generations.
Identification
How to classify the object
Verify solid center, pure-nickel specification, reeded edge, mass, size, and chrysanthemum design.
Evidence boundary
What this page does not claim
It is not the later holed 50 Yen.
Issue evidence
Specifications, grading, and authentication
- Mass
- 5.5 g
- Diameter
- 25 mm
- Hole
- none
- Edge
- reeded
- Production year
- 1955
- Legal issue year
- 1955
Material-specific grading
Nickel alloys: assess strike weakness, marks, dull luster, corrosion, and cleaning.
Authentication
Verify weight, diameter, thickness, alloy, magnetism, hole, edge, date and character style, die alignment, and evidence of casting, plating, altered dates, fake patina, or modern reproduction. Do not use destructive testing.
Continue
Related Taisho–Showa references
Evidence
Sources and scope
These links support the claims on this page. Source authority does not imply permission to republish source images.
Official specifications, first-issue years, legal-expiry dates, wartime and postwar regular types.
Open sourceImage identity and file-level reuse metadata only; historical claims are verified elsewhere.
Open source