Vintage PACA Mexican Aztec Coin Bracelet Silver Tone

This Aztec Calendar coin bracelet is stamped “PACA” on back and appears to be from Mexico. There is a smudged sticker that seems to read 4-20-1957 or something similar. It is not pure silver and appears to be child-sized. There are a couple of broken links (pictured) which can be repaired. This bracelet is from an estate jewelry collection spanning the 1930s-2000s. Quarter added for scale.