Fifteen silicon rectifiers
Fifteen silicon rectifiers: Ferranti ZS70 in plastic case (c.1960); Ferranti ZR15 (c.1960) ; Ferranti ZS151 in DO7 case (c.1965); Mullard BY182 12KV EHT for TV receivers (c.1970); International Rect. 3SB05 bridge rectifier (c.1965); ITT 7522; Transitron 1N138A; Eight other unknown