There is the type RIC 207 like yours, where Gaius (at left, the more prestigious position), the elder of the two brothers, has his shield placed in front of that of his younger brother and the simpulum above him marks him as Pontifex. Lucius, at right, has the lituus above marking him as augur. and there is the type where Gaius is shown on the right and Lucius on the left, RIC 210, posted here: https://www.cointalk.com/threads/divvs-avgvstus.340280/#post-3563635
Here's a type not shown yet- a coin minted by Herod Philip with Caesar Augustus on the obverse and an Augusteum (located in the region of Panias, later known as Caesarea Philippi) on the reverse. Panias was within the tetrarchy that Philip was given when his father, Herod the Great, died in 4 BC. Herod the Great received the territory from Caesar Augustus in 20 BC. In honor of a visit by Augustus, Herod the Great built and dedicated three temples (Augusteums) to him - the one depicted on this coin, another in Caesarea Maritima, and a third at Samaria-Sebaste. Caesarea Philippi was the first of Herod Philip's two capitals. His second capital was Bethsaida Julias (renamed "Julias" by Philip in honor of Augustus' wife, Livia Drusilla, later known as Julia Augusta). Caesarea Philippi, known as Banias today, is in a lush area in northern Israel that I enjoyed visiting earlier this summer. Flowing from this location at the base of Mt Hermon is a large spring that feeds the Jordan River. Caesarea Philippi was a center of pagan worship in ancient times (Panias and Banias are names derived from the Greek god Pan). The city is mentioned in the Gospels of Matthew and Mark. Judaea, Herod IV Philip, with Augustus, Æ20. Caesarea Philippi (Panias), dated RY 12 of Herod Philip (8/9 CE). Augustus laureate head right; countermark: star(?) / Tetrastyle temple (the Augusteum of Panias); L I B (date) between columns. Meshorer 97; Hendin 1221; RPC I 4940. 8.88g, 20mm, 12h.
An Æ 32 that has seen better days Uncertain mint in Bithynia (Apameia Myrlea?) 14 AD 31 x 32 mm, 18.84 g RPC 2097; McClean 3028; Stumpf 178-9; FITA 145-6G; Stumpf, "Numismatische Studien zur Chronologie der Römischen Statthalter in Kleinasien" (1991) p. 272, No. 1428 The late Augustan seated female figure on this coin of M. Granius Marcellus is described in FITA, p. 145, as Livia; whether this is true or not, she does not provide a precedent for the priestess type since she carries a double cornucopia nor does she appear to be veiled. The year 13 - 14 AD combined the 40th anniversary of the title Pater Patriae. It is natural to attribute to this occasion the AEs of M. Granius Marcellus, proconsul of Bythinia in ca. 14 - 15 AD. Ob.: IMP•CAESAR•AVGVSTVS• PONTIF•MAX TR P, Jugate busts of Augustus and Livia to l. Rev.: M GRANIVS•MARCELLVS•PROCOS, Livia seated r. holding double cornucopiae
Denarius of Augustus Minted at Rome in 19 B.C. by P. Turpilamus. Obv Head of Feronia right Rv. Parthiankneeling right offering Roman military standard with vexilium marked X RIC 288 4.03 grms 18 mm
Augustus Ar Denarius Colonia Patricia Mint 19 B.C. Rv three lined inscription within wreath RIC 77a 390 Grms 18 mm
