Watch List notes:

PAHANG: Bendahara Sewa Raja Wan Ahmad, 1863-1882, tin ¼ tampang (9.97g), AH1295, SS-20, "tin hat money", natural flan hole as made, nice example without date visible, F-VF, ex Charles Opitz Collection. These are variously known as a Tampang, Tin Hat, Pyramid or Pagoda money, although the latter two names are more common in Perak. They are an early form of currency with a value that was calculated against the amount of tin by weight which could be exchanged for one Spanish Silver dollar. There are a number of views as to when the Tampang first became recognized as money, but they were likely first used in the 17th century and made until the late 19th century.

Estimate: 75-100 USD