1914 Nether East Indies 1/4 G Counterfiet?

Given that both your coin and the CoinTalk coin have, actually, been used as buttons/cufflinks, I suspect they were made by local jewellers specifically for use as a button/cufflink. They are probably base-metal not solid silver, given a silver-wash or otherwise made to look silvery, and were probably sold to people who wanted to dress up nice but couldn't afford solid silver ones.

And, for the record, posting links to other forums when the discussion on those other forums is relevant to and helps the discussion here, is perfectly fine.