| Location | United States |
|---|---|
| Year | 1973 |
| Type | Bullion bar |
| Composition | Silver (.999) |
| Weight | 32.1 g |
| Diameter | |
| Thickness | |
| Shape | Rectangular |
| Technique | |
| Orientation | Medal alignment ↑↑ |
| Edge | Plain |
| Period | |
| Notice | |
| Reference(s) | Kidd#USSC-144 |
| Obverse description | |
|---|---|
| Obverse script | Latin |
| Obverse lettering | San Diego Zoo WORLD’S LARGEST 1916-1973 |
| Reverse description | Reverse Type 1 |
| Reverse script | Latin |
| Reverse lettering | UNITED STATES SILVER CORPORATION ONE TROY OUNCE .999+ FINE |
| Mint | United States Silver Corporation (USSC), Van Nuys, United States (1958-1978) |
| Mintage | |
| Numisquare ID | 4234202060 |
| Comments |