| | Pair of tuning forks (small modell) a1, with resonance cases |  | slinding weights, and striking hammer. For resonance, dissonance, beat and other investigations.
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(like AB-458, however small model, without polystyrene full packaging)
| Allgemein | | | Manufacturer: | Arno Barthelmes & Co. GmbH - Tuttlingen - Germany |
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