Representative issue study
Showa 26 (1951) Reeded-Edge 10 Yen
The dated 1951 reeded type separates manufacture from its 1953 legal issue start.
昭和二十六年十円青銅貨（ギザ有）
- Date
- 昭和二十六年 (1951 production date)
- Denomination
- 10 Yen
- Material
- bronze
- Issue class
- postwar-transitional
Context
Historical and monetary setting
Phoenix Hall became a durable design, while the edge changed to plain in 1959.
Identification
How to classify the object
Confirm reeded edge, date, architecture, mass, diameter, bronze surface, and die style.
Evidence boundary
What this page does not claim
Do not call 1951 the legal circulation start; official issue began in 1953.
Issue evidence
Specifications, grading, and authentication
- Mass
- 4.5 g
- Diameter
- 23.5 mm
- Hole
- none
- Edge
- reeded
- Production year
- 1951
- Legal issue year
- 1953
Material-specific grading
Brass and bronze: assess color change, verdigris, spotting, cleaning, fingerprints, and strike.
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 sourceCurrent and older valid 1-, 5-, 10-, 50-, and 100-yen design generations and official dimensions.
Open sourceImage identity and file-level reuse metadata only; historical claims are verified elsewhere.
Open source