Representative issue study
Showa 19 (1944) 1 Sen Tin-Zinc
This verified 50:50 tin-zinc issue replaces the unsupported domestic iron candidate.
昭和十九年一銭錫亜鉛貨
- Date
- 昭和十九年 (1944)
- Denomination
- 1 Sen
- Material
- tin-zinc
- Issue class
- emergency-circulation
Context
Historical and monetary setting
Its official specification and issued status make it the correct late-war emergency architecture test.
Identification
How to classify the object
Compare mass, diameter, characters, strike, granularity, and corrosion; avoid destructive alloy tests.
Evidence boundary
What this page does not claim
This is not an iron coin; domestic issued iron remains unverified.
Issue evidence
Specifications, grading, and authentication
- Mass
- 1.3 g
- Diameter
- 15 mm
- Hole
- none
- Edge
- plain
- Production year
- 1944
- Legal issue year
- 1944
Material-specific grading
Tin alloys: assess softness, darkening, spotting, corrosion, bends, and granular surfaces.
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