Watch List notes:

Caria, Orthosia. Nero and Agrippina Junior. A.D. 54-59. AE 19 (19.43 mm, 5.08 g, 12 h). NEPΩΝ (CCW) [AΓΡΙΠΠΙΝΑ?], conjoined bare-headed and draped busts of Nero and Agrippina Junior right / OP[ΘωCΙ-ЄωΝ] (?), laureate head of Zeus right. RPC I 2825 Obverse, 2826 Reverse. Rough VF, attractive brown patina with hints of green but legends crowded and weakly struck, void over Nero's ear. Very rare and only semi-published. 

RPC I describes the obverse of this coin in the listing for # 2825 (likely a die match) and the reverse in the listing for # 2826 (not a die match but essentially the same), however, nowhere do they seem to be described together as a pair.