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20 Mark Herzogliche Sparkasse
| Issuer | Federal state of Brunswick |
| Year | 1918 |
| Type | Emergency banknote |
| Value | 20 Marks |
| Currency | Mark (1914-1924) |
| Composition | Paper (Cardboard) |
| Size | 159 × 102 mm |
| Shape | Rectangular |
| Printer | |
| No. printed | |
| Designer(s) | |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | |
| Obverse description | Text in field. Value at center. |
| Reverse description | Usually cut cancelled at top left corner. |
| Signature(s) | |
| Protection type | |
| Protection description | |
| Obverse lettering | |
| Reverse lettering | |
| Variants | |
| Catalog ID | 2355662880 |
| Comments | |
