Larger Photograph (69.8K)
| Designer | : | Stewart Coffin |
| Craftsman | : | Stewart Coffin |
| Category | : | Interlocking |
| Material | : | Cherry |
| Pieces | : | 6 |
| By adding additional blocks to the six pieces of a Triangular Prism, the number of faces is doubled. Number 12P in Stewart's numbering system. | ||