Watch List notes:

Graeco-Baktrian Kingdom. Apollodotos I. Ca. 174-165 B.C. Æ hemiobol (24.0 mm, 9.15 g, 6 h). Apollo standing facing, holding arrow and bow / Tripod, monogram to right. Bopearachchi Série 6; cf. SNG ANS 359-63. Fine. 

This monogram is not listed in Bopearachchi.