Ultrix plates were much later.  The original Unix plates were there for a
few years.

On Tue, May 10, 2022 at 8:58 PM Kenneth Goodwin <kennethgoodwin56@gmail.com>
wrote:

> As I recall, The UNIX plates were the first in the series and distributed
> at a USENIX conference AT THE DEC booth The next year, they came out with
> the ULTRIX plates.
>
> On Tue, May 10, 2022, 8:54 PM Steve Bourne <srb@acm.org> wrote:
>
>> Armando also responsible for the UNIX "live free or die" plates. I still
>> have a few.
>>
>> Steve
>>
> --
Sent from a handheld expect more typos than usual