URL Avenger?

Ethced in copper	(C) 1975 UNIVERSAL RESEARCH LABS INC.
			CT-1-1
			EG 1020-3

.l10	n82s114		read as 74s474	handwritten "A" on chip
.h10	n82s23B
.g10	n82s23B
.d10	n82s23B


15728.6 KHz crystal

Previous owner had labeled the board Avenger