Hi, lovely pieces. I believe your servers are made by Mexican Silver Smith J. Sotelo. I don't have my book with me so I am not 100% on the maker but I am fairly confident that they are of Mexican origin.
I checked Hougart's little book of Mexican Silver Hallmarks and it does not mention who the maker is other than that they are an unidentified Taxco silversmith. This silversmith also once used the Eagle1, eagle 3 and TS-22 narks. This set is definitely Mexican though