For our group research project for the Expert Class Type Design at the Plantin Insitute in Antwerp, Belgium, we currently study and revive a typeface cut by Robert Granjon in 1569–70: Ascendonica Romaine. Below you will find four images photographed with a microscope camera, as found in the MA08 set at the MPM
The top two images clearly show a semicolon and a comma.
But what is shown in the bottom two images?
Both characters are positioned high, near cap height.
Our first guest is that the bottom right image shows a double quote, and consequently the different-looking character on the bottom left could be an apostrophe, but:
Are they an apostrophe and a double right quote?
Were apostrophes in use in 1569, and if so in the same way as we use them now?
Where can we find more information on this peripheral subject?
The character set does not include any reversed or mirrored quotes, or single quotes (provided the bottom-left character is not a single quote), or other similar characters such as straight quotes or primes (or characters looking like those). If it is helpful, this type was extensively used for bibles, missals, etcetera.
Thank you for any answers, especially if backed up with resources!