Watch List notes:

MEXICO, Estados Unidos Mexicanos. 1905-pres. AV 50 pesos (37mm, 41.64 g, 6h). Ciudad de México (Mexico City) mint. Dually dated 1821 and 1931. Eagle standing facing on cactus, wings spread, head right, grasping snake in beak and right talon; all atop laurel and oak wreath / Victory striding forward, holding wreath in raised right hand; mountains in background. BW 656; KM 481; Friedberg 172. AU.

From the Jack A. Frazer Collection. Ex Ponterio 131 (11 September 2004), lot 385.