(1932) Valve Data Booklet, Wireless World.

Valves Advertised:

S207, S208, WD2, HD2, SD2, TD2, ZD2, UD2, YD2 E235, SP2, P215, D120, S408, D410, W412, H412, A420, E414, E420, E422, E425, P420, P425, S415N, S431N, S412N, S410N, S430N, D410N, A430N, A440N, W415N, E430N, P440N, YN4, S409, W420, A430, P520, YG5, S2010N, A2030N, E2020N, P2020N, S2031N, K435/10, K450/25, K450/40, P430, P440, G429, G431, G470, G4120, G4100, G4150, & V60.