Unknown Taxco artist with stamped FMS and eagle 3 marks.
The face carving follows near classic pre-colonial Aztec facial representations. Deeply sculpted, the head with its strong features, is actually "set" in place by clever use of a cleverly crafted silver cap, collar and ear pieces. The cap and collar are inlaid with the same green stone, pieced and/or crushed.
"Unknown artist" is appropriate when a work of art is unsigned and a supported opinion about who made it is not available (on Savvy Collector).. "Attributed to" precedes the name of an artist when information suggests that it likely was made by that artist (on Savvy Collector).