I think a "proper" certificate will have used the stationery available at the time. The old ones I've got say things like 3/87 20,000, which I always assumed to be the date and the print run.
I assume (dangerous, I know!) that the digital images use the contemporary headings at the tops of the pages. While these are the modern renderings, I've assumed that they've looked, and used what was given.
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The chestnuts cast their flambeaux
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