Philips EC57 - Disc Seal Triode page 1 2 3 4 5 6 7 8 9 10 11 EC57 sheet 1 2 3 4 5 6 A B C D FP date 1958.12.12 1958.12.12 1958.12.12 1958.12.12 1957.03.03 1957.03.03 1956.06.06 195 Rating: 1 ★ (3 votes)
Philips
