74542 semiconductor manufactured by Lafayette Radio Electronics, listed as 74542 (circa 1969).

74518 semiconductor manufactured by Lafayette Radio Electronics, listed as 74518 (circa 1969).

74492 semiconductor manufactured by Lafayette Radio Electronics, listed as 74492 (circa 1969).

74468 semiconductor manufactured by Lafayette Radio Electronics, listed as 74468 (circa 1969).

74443 semiconductor manufactured by Lafayette Radio Electronics, listed as 74443 (circa 1969).

74369 semiconductor manufactured by Lafayette Radio Electronics, listed as 74369 (circa 1969).

74344 semiconductor manufactured by Lafayette Radio Electronics, listed as 74344 (circa 1969).

74260 semiconductor manufactured by Lafayette Radio Electronics, listed as 74260 (circa 1969).

74245 semiconductor manufactured by Lafayette Radio Electronics, listed as 74245 (circa 1969).

74146 semiconductor manufactured by Lafayette Radio Electronics, listed as 74146 (circa 1969).

74062 semiconductor manufactured by Lafayette Radio Electronics, listed as 74062 (circa 1969).

74047 semiconductor manufactured by Lafayette Radio Electronics, listed as 74047 (circa 1969).

74013 semiconductor manufactured by Lafayette Radio Electronics, listed as 74013 (circa 1969).

74534 semiconductor manufactured by Lafayette Radio Electronics, listed as 74534 (circa 1969).

74526 semiconductor manufactured by Lafayette Radio Electronics, listed as 74526 (circa 1969).

74484 semiconductor manufactured by Lafayette Radio Electronics, listed as 74484 (circa 1969).

74476 semiconductor manufactured by Lafayette Radio Electronics, listed as 74476 (circa 1969).

74435 semiconductor manufactured by Lafayette Radio Electronics, listed as 74435 (circa 1969).

74427 semiconductor manufactured by Lafayette Radio Electronics, listed as 74427 (circa 1969).

74336 semiconductor manufactured by Lafayette Radio Electronics, listed as 74336 (circa 1969).