Whimsygoth Gothic Marcasite Art Deco Reproduction Vintage 80s 90s Necklace

Signed and maker’s mark indicates Tasaki I do not see a 925 stamp This necklace is a reproduction of early 20th century style but is itself vintage - from the mid 1980s to early 1990s (this was actually on my Christmas list as a teenager!) **There is a small imperfection - see the last photo - but I’m having difficulty analyzing exactly what, possibly asymmetry in the production or loss of a small piece of metal? All marcasite pieces appear to be intact.