On my website are some sidereal degree positions from early horoscopes compared to the tropical. http://users.snowcrest.net/sunrise/arochberg.htm
There is also an article on how the 30 degree signs were measured in Mesopotamia. ("The Zodiac in Mesopotamia") http://users.snowcrest.net/sunrise/LostZodiac.htm
The horoscopes are currently discussed in:
(1) The Rochberg text mentioned in the link above (1998)
(2) GREEK HOROSCOPES by O. Neugebauer and Van Hoesen (1987)
(3) Volumes of Vettius Valens' THE ANTHOLOGY published by The Golden Hind Press (Project Hindsight) in the 90s.
(4) There might be other chart examples in other Project Hindsight translations. I don't remember if there are other examples.
I believe the Valens volumes are now available again. These are small paperback editions usually under 100 pages. These were translated by Robert Schmidt and edited by Robert Hand. Robert Hand asks in one of the prefaces what zodiac Valens was using, but Neugebauer has shown that it was sidereal. Valens was a younger contemporary of Ptolemy. 2nd century C.E. Also Kellerstom's graph shows the use of the sidereal zodiac in Valens' charts. (I gave that link in an earlier post.)