| 206 / | HD | SPECIAL RECEPTACLE OR PACKAGE |
| 37 | DF | FOR POCKET OR PERSONAL USE {3} |
| 37.1 | | .~ For a key {6} |
| 37.2 | DF | .~.~> Including external element for ejecting key |
| 37.3 | DF | .~.~> Key frictionally retained in container |
| 37.4 | DF | .~.~> Compartmented |
| 37.5 | DF | .~.~> Including key retainer of two elements movable relative to each other and to the container |
| 37.6 | DF | .~.~> Including plural, serially aligned key retainers {1} |
| 37.8 | DF | .~.~> Including key retainer for common mounting of plural keys |