This is a hair ornament—specifically an ear-cleaning pin—made of gold-plated solid silver and featuring marine-themed motifs.
Could anyone please tell me the meaning of these characters? I believe there are four of them; the third one is 足, which leads me to think it might be Chinese.
Thank you
日本足金 - Japanese 24K Gold.
In Asian terminology (particularly in China and other Eastern markets), the term 足金 (zujin) denotes a high degree of gold purity—traditionally corresponding to a fineness of approximately 990 (i.e., about 20–22 karats or higher, approaching pure gold).
or
The rectangular mark is a traditional Chinese or East Asian hallmark, 足銀 (Chinese: *zúyín*; Japanese: *ashi-gin*), which literally means “pure” or “full” silver.
I think you’ve revealed another ideogram. I scratched the very tip of the piece against a touchstone and applied the acid—it tested positive for silver. Looking at the ideograms you provided, I think two have now been identified: **本足** . The first and last ones still need to be deciphered. Maybe *本足紋.
zu jin (足金), which literally translates as “pure gold” or “high-purity gold”.
The mark “足紋” (zuyin / zuwen): This is a traditional hallmark used on high-purity silver items (often denoting pure or high-grade silver; it is found, for example, on Chinese export silver from the Qing Dynasty or the early 20th century).
Thank you very much! Knowing that it is indeed Chinese is enough for me. I’m already happy to have the two bottom characters deciphered.
U welcome, APC!___________________________ 
