[john in springfield]

Ho! I stand corrected. The seal is NOT the kangaroo and dodo used for the whole of Australia, it's the very similar official South Australian lion and unicorn.

Actually, I'm wondering whether the kangaroo and dodo seal was derived from the more likely older and more British lion and unicorn.

But no matter. That explains why the tail on the certificate seal is up in the air. It explains why the shield is more rounded than the one on the full Australian seal. And if you look closely, you can see a bit of the shape of the unicorn.

[john in springfield]

It appears I was right about the kangaroo and dodo being a take-off on the older lion and unicorn. The latter derives from the coat of arms of the British monarchy.

[Mount Athos]

By the way I really agree with your concerns about the seal on the kenyan doc, that it looks terribly indistinct. I’ve been looking at a lot of government seals in these searches and they all look like something distinctive.
Wish we had a higher res image of the doc.

[Mount Athos]

That is a pretty good match! Only obvious difference to me is that the animals on either side are less upright. But it's a satisfactory match. Glad I found the official South Australian seal of 1934.

Now let's see if we can do anything with the Kenyan seal, even though it is terribly indistinct on the doc.

Could you attempt to compare this seal and see how it looks against the seal on the doc? Obviously the big problem of overlaying an oval on a circle, but can anyone see any similarity? I understand that they may have had a completely different seal than the one I'm putting up but at least it's something to try.