Imgur gallery: https://imgur.com/a/BUeOKXX (3 coins) Sorry if this is the wrong board for this issue!
This is the correct board. The third coin is Nabataean, like this one: NABATAEA, Aretas IV with Queen Shuqailat 9 BCE - CE 40, Petra AE18 Obv: jugate busts of Aretas IV and Shuqailat right, Rev: crossed cornucopia; Nabataean Aramaic letters between and below Ref: Meshorer 112-114? This is one of the most common types of Nabataean bronzes... maybe the most common type. A cool bit of history nonetheless! The other two are identifiable as well. I have to get back to work... someone else will probably help with the others shortly.
The second coin is purportedly Gordian I Africanus with JVNO REGINA on the reverse. I couldn't find a match on wildwinds.com - the style seems a bit off for the Imperial mint so there is a chance it might be a forgery, or if not, some kind a localized provincial issue but then the legend would most likely be in Greek. Someone else might chime in with more information.
For the first coin: The legend above the bull is retrograde, it reads PETA. Therefore it might be from Petra. The legend below the bull should be COLONI.., which might be possible (also retrograde). Here are some non retrograde examples. (not sure about the emperor) https://www.acsearch.info/search.html?id=3310709 https://www.acsearch.info/search.html?id=3313315 https://www.acsearch.info/search.html?id=4662867
Thank you TIF. I have one of these...but not as beautiful as your coin which has lovely purple tones to it. I was going to post mine to ask for help identifying it; but, you answered my questions already.
The second coin, of Gordian, has to be a fake because of the reverse IVNO REGINA; as Emperors never used this, except for Claudius II (RIC V Antioch 212) and this was surely because of Zenobia.
