北婆罗园丘代用币隐藏“暗记”？

非常感谢我们的脸谱网友Mr Chye Choonchooi 先生的细心发现有一部分的园丘代用币有隐藏“暗记”，同时也很感谢Mr Wan Thiam Teik资深藏友的见解，这些暗记的可能性，笔者觉着着很有学术价值，所以特别载图记档，希望未来可以给予有兴趣在这方面研究的藏友一个参考。

Borneo Plantation Token, Sandakan SS-54, P-66, NGC PF64RD

A piece of Borneo Plantation Token, Sandakan SS-54, P-66, NGC PF64RD has been sold through eBay for USD 848.00 (Approximately RM3650 in May 2017. Most of the Borneo Plantation coin series are calling attention of old coin collectors recently.

Straits Settlements 1/4C 1862 NGC MS64BN

A piece of Straits 1862 1/4 cent which secured by NGC holder and also highest grade of BN category in NGC census has been sold via eBay for USD 2,049. According to NGC census, 2 pieces of MS64BN have been recorded and another two pieces in MS64RB and MS65RB were found. In total, 11 pieces in MS were archived insofar (the real number may be lesser if cross sending or re-sending for grading without data adjustment).