Any ideas what this is?

[Vlasta]

Can anyone identify this die?

[Twinrocket]

I assume you have already looked for part numbers on the wafer/die?
What does it say?

[Birdman.]

That doesn't look like anything I've seen before, and unfortunately, resolution is so low that counting bond pads or looking at other details isn't possible.

[max1024]

Like 8086/8088 board?

[Vlasta]

I cannot get a better photo of them yet as they are on the way to AVICC. I bought 20 of them. They are 4" wafers and come in a case marked "ST" but they do look like something sophisticated and so nice I could not resist.....

[Vlasta]

Another one from the same seller - this one is definitely ST but what device?

[aberco]

Look like standard logic cells, will be hard to know without die markings.

[Vlasta]

actually it is the same one as I already bought looking at it. I will PM you the link to a higher res shot from the auction.