Hecho en Mexico D F, Silversmith EGP?

[Mary's Marvels]

I am unable to ID this MX silversmith. The item is a set of 6 small stemmed glasses with silver overlay. The mark is: Hecho en Mexico D F 925 in a circle with 3 letter in the middle. I'm pretty certain the middle letter is G. Not certain what the first and last letters are. The first letter might be E or S. The last letter might be P, R, or B. That is, EGP, EGR, EGB, SGP, SGR, SGB.