Representative issue study
Showa 19 (1944) Holed 10 Sen Tin
The documented 93% tin issue is a verified late-war emergency circulation type.
昭和十九年十銭錫貨
- Date
- 昭和十九年 (1944)
- Denomination
- 10 Sen
- Material
- tin-zinc
- Issue class
- emergency-circulation
Context
Historical and monetary setting
It followed the aluminum generation and continued as a low-value bridge after surrender.
Identification
How to classify the object
Assess softness, darkening, spotting, corrosion, bends, granularity, mass, and central hole.
Evidence boundary
What this page does not claim
Do not label every gray emergency coin tin without measurement and design agreement.
Issue evidence
Specifications, grading, and authentication
- Mass
- 2.4 g
- Diameter
- 19 mm
- Hole
- 5 mm
- 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 sourceObject-level measured examples of nickel, aluminum-bronze, aluminum, tin, and tin-zinc wartime coins.
Open sourceImage identity and file-level reuse metadata only; historical claims are verified elsewhere.
Open source