Alle Röhren vom Hersteller: STC - Standard Telephones and Cables Limited
- → 24B9 Inventar: 6395 Hersteller: STC - Standard Telephones and Cables Limited
- → 5A/152M Inventar: 7803 Hersteller: STC - Standard Telephones and Cables Limited
- → S204/2K Inventar: 7932 Hersteller: STC - Standard Telephones and Cables Limited
- → S109/1K Inventar: 8378 Hersteller: STC - Standard Telephones and Cables Limited