
| Graslitz | Nauheim |
| 1. Split bell keys | 5. Left bell keys, soldered toneholes |
| 2. Left bell keys, wire keyguards | 6. Right bell keys, drawn and rolled toneholes |
| 3. Right bell keys, wire keyguards | 7. Plexiglas/"Angel Wing" keyguard |
| 4. Right bell keys, sheet metal keyguards | 8. Right bell keys, sheet metal keyguards |