If no one else has the info, I  am check my Sinclair 3rd party add-on docs,
I have most known ads and product literature related to this subject.
Bill

On Sun, Apr 8, 2018, 11:16 PM Dan MacMillan via cctalk <
cctalk@classiccmp.org> wrote:

> Hi everyone,
>
> I collect Timex Sinclair / ZX81 gear, but have never seen one of these
> before:
>
>
> https://www.ebay.com/itm/RARE-Vtg-TIMEX-SINCLAIR-ZX81-Computer-PROGRAMMER-CONSOLE-Keyboard-Program-Micro-/222912636711?_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=E3Q5DniESsEnsW083EldQnt%252FNf4%253D&orig_cvip=true&rt=nc
> <
> https://www.ebay.com/itm/RARE-Vtg-TIMEX-SINCLAIR-ZX81-Computer-PROGRAMMER-CONSOLE-Keyboard-Program-Micro-/222912636711?_trksid=p2047675.l2557&ssPageName=STRK:MEBIDX:IT&nma=true&si=E3Q5DniESsEnsW083EldQnt%2FNf4%3D&orig_cvip=true&rt=nc
> >
>
> Do any of you recognize it? Can you explain its purpose, please?
>
> Cheers,
> -Dan

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