Brass: Iron Clays
A set of 100 Iron Clays in 5 denominations, in a box, available as an add-on in the Brass ~An Industrial Revolution Kickstarter.
Note: 70 Iron Clays in 4 denominations will come in every copy of Brass (100s are not included, and neither is the box).
Credits to BoardGameGeek
Learn more about the Kickstarter here.