Feature=Cartridge Research/Sound Field Correction by Delay/Simple Preamplifier/5 Pole PP Amplifier/VT-25A/Parts Research/Digital Recording/SR Techniques/Audio Quality Improvement of FM Stations Technology/CD Player Test System/Schematic: Western Electric 42-A, 43-A, 41-C/S61.3.1 Issued
Pair Tube Large Punch Top Grid Lot: 6426/6126 Crack on one side base and wobble (Eiji Tamura)
Maintenance information: 2020.9.6 sound sound confirmed
Accessories: original box