Watch List notes:

L. Memmius. 109-108 B.C. AR denarius (19.1 mm, 3.88 g, 7 h). Rome mint. Male head right, wearing oak-wreath; monogram below chin / L·MEMMI, the Dioscuri standing facing before their horses, each holding a spear. Crawford 304/1; Sydenham 558; RSC Memmia 1. gVF. 

Ex D. Thomas Collection. 

Crawford notes that this moneyer may have traveled to Egypt and the unusual depiction of the Dioscuri may have been based on Egyptian artwork.