This is a rare set of solid gold ceramic chips! These National Semiconductor devices are in a high-yield ceramic 14-pin DIP gold plated top and bottom with gold leads. The LM124D/883B is a Mil-Spec 883B op-amp, and the LM201AD is also an op-amp device. Vintage appears to be late 1960s / early 1970s.
Condition: New Old Stock