Safelink Lightning Protector
Dimensions: 3" × 1" (76.2 × 25.4mm). Height: 21.7mm. Screws: 4BA.
It is extremely unlikely that this device would have provided any useful protection against a direct lightning strike.
DWK Sept. 2013.
Instriction leaflet is >70 years old, therefore public domain.
Additional text and photographs ©
D. W. Knight