* Script: The script would primarily be Uncial, a form of majuscule (all capital letters) writing. Uncial script was characterized by rounded letters, unlike the angular style of later minuscule script. Words were usually not separated by spaces.
* Letters: The letters themselves would be essentially the same as those used in modern Greek, though some letter forms might differ slightly in their precise shape compared to modern conventions. The alphabet hadn't undergone significant changes by this time.
* Spelling and punctuation: Spelling conventions were somewhat fluid, with variations in the use of certain letters and accents. Punctuation was relatively minimal compared to modern standards. Some texts might have used points or other marks to indicate sentence breaks, but consistent punctuation systems were not yet established. Accents (like acute, grave, and circumflex) were not as systematically used as they are now.
* Abbreviations: Abbreviations were common, particularly in inscriptions and official documents, to save space.
* Material: Inscriptions would be found on stone, metal, or pottery. Papyri (made from papyrus reeds) were the common material for manuscripts, though they were less durable and fewer survive from this period compared to later ones.
In essence, while the alphabet itself was familiar, the *appearance* on a page would be distinctly different from a modern Greek text due to the lack of spaces between words, the uncial script style, and less consistent punctuation. A modern reader might find it somewhat difficult to decipher at first, particularly without familiarity with the uncial script. However, someone literate in Koine Greek (the common dialect of the time) would recognize the words and language without much trouble.