(C)1402A 1024bit Dynamic Shift Register

[Jedi08]

I don´t have a clue about the value of these chips.

Any suggestions?

1402A grey traces NOS

C1402A grey traces NOS

C1402A white NOS very early dc

[Jedi08]

No ideas?

[dstraney]

For what it's worth, only one person wanted any of my "have more than I can use from old basement cleanout" Intersil 7552s (https://www.cpu-world.com/forum/viewtopic.php?t=38733), which is also a memory chip dated 1974 in a similar package. The 7552s are probably less historically interesting than these in some ways, and don't have the gray streaks (I assume from the lead frame visible through the ceramic, or conductive silkscreened ink, or something similar?), but just as a point of reference at least.

[intergalactic]

No photo of the non-C 1402?

Educated guess - somewhere in the $50-$300 range, each.

$50 - low effort sale - aka - I'd buy those 3 for $150

$300 - on eBay, international shipping enabled, and you'd be willing to wait an extended time to sell them.

[intergalactic]

On a second look, $300 is wishful thinking, $200 is probably more accurate for the high side.
More guess than educated

[rjluna2]

The first one was made in 23rd week of 1974 and the second one is 3rd week of 1974 here.

[Jedi08]

Yes, the white ones have an earlier date code 7407 than the zebra ones 7423.