It's not a manuscript, it's in the retyped old modern book/article.
Original text is post-Hellenistic ancient time (Roman era I call it)
Manuscript - unknown
I had a reprint of a page from retyped in book-like print from late19th or early 20th century.
That 19th/20th cent. Greek text and translation was printed with standard type in italic (slant) polytonic Greek letters (standard "modern" scholar conventions) and footnotes in Latin.
In the main Greek text there is only that "letter L" that is not a standard Greek letter, and it looks nothing like stigma or other obsolete letters-numbers in the standard forms (I double checked these letters in Wikipedia). This "L" is slant to the right as are Greek letters. Just two strokes, the vertical one is slant the same way as a capital Iota, and it grows the vertical line from the bottom to the right, which looks exactly like capital L (in sans-serif fonts like Arial or the one used here on forum). It does have (in both cases) a very slightly noticeable little thicker blob at the right-end of the horizontal line, but this could be just the old print artefact. It is just letter L, I wouldn't doubt it could be anything else and I doubt anyone would say it is ambiguous. It just surprises me.
It was a transcription of the table with number of days in one row. Some of them as fractions.
And the reprint had a translation, which renders:
L' δ' κ' as: 4/5
α' L' ι' as: 1 3/5
And I'm puzzled what that "L" is. Is this capital Roman letter or maybe a print convenction (a placeholder) for some kind of special sign