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        20 Pfennigs - Berlin Carl Mampe    
    
| Issuer | Berlin, Prussian province of | 
| Year | 1914 | 
| Type | Emergency coin | 
| Value | 20 Pfennigs (20 Pfennige) (0.20) | 
| Currency | Mark (1914-1924) | 
| Composition | Zinc | 
| Weight | 2.5 g | 
| Dimensions | 22.0 mm | 
| Thickness | 1.0 mm | 
| Shape and Technique | Octagonal (8-sided) Milled
 | 
| Orientation | Medal alignment ↑↑ | 
| Engraver(s) |  | 
| In circulation to |  | 
| Reference(s) | Men18#2552.4 , Hasselmann#114.3 | 
| Obverse description | Pearl rim, legend surrounding pearl circle with denomination centered | 
| Obverse script | Latin | 
| Obverse lettering | CARL MAMPE
20
✿ BERLIN ✿ | 
| Reverse description | Pearl rim, legend surrounding pearl circle with elephant centered | 
| Reverse script | Latin | 
| Reverse lettering | GELDERSATZ
✿ WELTKRIEG 1914/17 ✿ | 
| Edge | Plain | 
| Mint |  | 
| Mintage | 1914  -  - 
 | 
| Catalog ID | 9000541970 | 
| Comments |  |