That such apostrophe?

[-JKP-]

After a conversation with Diane about this subject, I am switching my opinion of the script as being based on Latin to Greek. That such apostrophe on word-initial "40" is found, for example, on the top left word of this image:



I'm sold.

At the very least, this might imply that the scribe was used to writing Greek and thought of VM "40" as the same.

The rounded cap is found very frequently in Latin. Some of the less-used VMS characters resemble Greek (even scribes in England, thousands of miles from Greece, often knew Greek), and there's a fairly high probability the scribe knew Greek as well, but the majority of the characters come directly from Latin, so if a character is found in both languages, there's no way to know the source, but the more likely explanation is that it's from Latin, since most of them are from Latin.

The "4" shape is also found in latin. It's less common than than the EVA-ell glyph which was used in Latin for the number "4" but I've seen examples and today I saw a 14th-century manuscript with the "4" shape clearly written. I've seen it also in Greek, but it's not drawn quite the same, it usually represents a flourished "delta" character and most scribes don't draw it like a "4".

Even the gallows "P" is found in Latin (sometimes as a pilcrow, sometimes as a paragraph-end marker). This came from the same shape in Greek.