pack of user cards and shadow cards. For BellSwipe Coded System.
| Make | Bell Systems |
|---|---|
| Manufacturer | Bell System (Telephones) Limited |
| Model code | BS20C |
| Series | Bell Swipe Series |
| Accessories | Swipe Cards for BellSwipe System |
| Additional info | pack of user cards and shadow cards. For BellSwipe Coded System. |