1 | MPZX | Mineral Point Zinc Co. | 8/1920-4/1938 | | NAKINA |
2 | MPZX | Mineral Point Zinc Division, The New Jersey Zinc Co. | 1/1941-10/1957; eliminated 10/1958 | | NAKINA |
3 | MPZX | Mineral Point Zinc Co. | Apr-38 | | NRHS |
4 | MPZX | Mineral Point Zinc Division, The New Jersey Zinc Co. | 1/52-10/57; eliminated 10/58 | | NRHS |
5 | MPZX | MINERAL POINT ZINC DIV., NEW JERSEY ZINC CO. | | | PWRC |