From 1971-1974 the U.S. Government issued proof Eisenhower dollars in singular packaging in brown slide-out boxes. The coins were struck in silver and stored in hard plastic set into a red felt holder. These are commonly referred to as "Brown Ikes" by collectors.
| coinage-type | Eisenhower Dollar |
| desg | PR |
| designer | Frank Gasparo |
| diameter | 38.1 |
| edge | Reeded |
| material | 40% silver; 60% copper |
| mint-mark | S |
| mintage | 1,811,631 |
| ngc-id | 258T |
| variety | Silver |
| weight-grams | 24.59 |
| year-display | 1971-1978 |