Watch List notes:

The Roman Empire
Armenia Capta Issues

Denarius, Colonia Patricia (?) circa July 18-17/16 BC, AR 3.86 g. S P Q R [IMP CAE]SARI AVG COS XI TR POT VI Bare head r. Rev. [CIVIB·]ET·SI – GN·MILIT·A·PA – RT·RECV [PER] Facing quadriga on central part of triumphal arch, figures l. and r. holding respectively standard and Aquila/bow. C 84. BMC 428. RIC 134a. CBN 1232.
Rare. Struck on a narrow flan, lovely iridescent tone and good very fine

Ex Gorny & Mosch 151, 2006, 383 and Manhattan 1, 2010, 176 sales.

This is the triple arch reverse type which replaced the single span Augustan arch in the forum - for single arch depictions see lots 40 & 58. The central span remains the same as shown on the earlier depictions. Given the progression of this type it would seem the second issue, still with a single span, but now with the added legend "SIGNIS RECEPTIS" relates to a planned construction project to increase the glory of the original arch. Here would seem to be the final result of that project where the ultimate three spans are shown completed. Although only the foundations remain one must assume the reverse legend here related to the Parthian peace and the return of the standards must have appeared in some form on the actual arch. MSG.