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        Medal - The Caltech - JPL Numismatic Society Venus - Mercury Mariner    
    
| Location | United
States | 
| Year |  | 
| Type | Membership medal | 
| Composition | Bronze | 
| Weight | 19.9 g | 
| Diameter | 39 mm | 
| Thickness |  | 
| Shape | Round | 
| Technique | Milled | 
| Orientation | Medal alignment ↑↑ | 
| Edge | Smooth | 
| Period |  | 
| Notice |  | 
| Reference(s) |  | 
 
                    
| Obverse description |  | 
| Obverse lettering | MARINER 1973
FIRST
MERCURY
PHOTOS
X
MSJ
VENUS - MERCURY | 
| Obverse script | Latin | 
| Reverse description |  | 
| Reverse lettering | CALIF. INSTITUTE OF TECHNOLOGY - JET
PROPULSION LABORATORY
THE
CALTECH - JPL
NUMISMATIC
SOCIETY
COMMEMORATES
ACHIEVEMENTS
IN SPACE EXPLO-
RATION | 
| Reverse script | Latin | 
| Engraver |  | 
| Mintage | ND  -  - 
  | 
| Catalog ID | 6690830630 | 
| Comments |  |