2N2715 semiconductor manufactured by Sylvania, listed as 2N2715 (circa 1979).

2N2714 semiconductor manufactured by Sylvania, listed as 2N2714 (circa 1979).

2N2713 semiconductor manufactured by Sylvania, listed as 2N2713 (circa 1979).

2N2712 semiconductor manufactured by Sylvania, listed as 2N2712 (circa 1979).

2N2711 semiconductor manufactured by Sylvania, listed as 2N2711 (circa 1979).

2N2710 semiconductor manufactured by Sylvania, listed as 2N2710 (circa 1979).

2N2709 semiconductor manufactured by Sylvania, listed as 2N2709 (circa 1979).

2N2708 semiconductor manufactured by Sylvania, listed as 2N2708 (circa 1979).

2N2707 semiconductor manufactured by Sylvania, listed as 2N2707 (circa 1979).

2N2706 semiconductor manufactured by Sylvania, listed as 2N2706 (circa 1979).

2N2699 semiconductor manufactured by Sylvania, listed as 2N2699 (circa 1979).

2N2696 semiconductor manufactured by Sylvania, listed as 2N2696 (circa 1979).

2N2695 semiconductor manufactured by Sylvania, listed as 2N2695 (circa 1979).

2N2693 semiconductor manufactured by Sylvania, listed as 2N2693 (circa 1979).

2N2692 semiconductor manufactured by Sylvania, listed as 2N2692 (circa 1979).

2N2691A semiconductor manufactured by Sylvania, listed as 2N2691A (circa 1979).

2N2691 semiconductor manufactured by Sylvania, listed as 2N2691 (circa 1979).

2N2690 semiconductor manufactured by Sylvania, listed as 2N2690 (circa 1979).

2N2689 semiconductor manufactured by Sylvania, listed as 2N2689 (circa 1979).

2N2688 semiconductor manufactured by Sylvania, listed as 2N2688 (circa 1979).