Hallmark for an antique, 40+lb, sterling silver lazy susan
This mark is attributed to Plateria Azteca (mark: Azteca and Aztec warrior head). I believe I see an eagle mark of 31. According to Hougart's book, Plateria Azteca's use of (Hector) Aguilar's eagle 31 was supposed to be restricted to those items manufactured on behalf of Hector Aguilar. Your second photo (img_0925.jpg) matches Hougart's description to a similar mark ca. 1949-1952. Reading under Hector Aguilar's entry, it states: "Aguilar also contracted with Horacio de la Parra's Plateria Azteca to produce hollowware. The "Azteca" items are marked with eagle 9 or 31 and a design or production number." "It is likely that Plateria Azteca was one of many companies purchased by Conquistador in the 1940s."