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Medal - 25 Years Koss Stereophones
| Location | United Kingdom |
| Year | 2009 |
| Type | Commemorative
medals |
| Composition | |
| Weight | 25.8 g |
| Diameter | 38.8 mm |
| Thickness | 2.83 mm |
| Shape | Round |
| Technique | Milled |
| Orientation | Medal alignment ↑↑ |
| Edge | |
| Period | |
| Notice | |
| Reference(s) | |
| Obverse description | Headphones |
| Obverse lettering | PORTAPRO 25thm ANNIVERSARY 1984/2009 |
| Obverse script | Latin |
| Reverse description | Headphones |
| Reverse lettering | HEARING
IS BELIEVING r KOSS STEREOPHONES r |
| Reverse script | Latin |
| Engraver | |
| Mintage | 2009 - -
|
| Catalog ID | 4042047810 |
| Comments | |
