Larger Photograph (59.1K)
| Designer | : | Stewart Coffin |
| Craftsman | : | Stewart Coffin |
| Category | : | Interlocking |
| Material | : | Birch |
| Pieces | : | 6 |
| By adding additional blocks to the six pieces of a Hexagonal Prism, the number of faces is doubled. Number 11A in Stewart's numbering system. | ||