On Emil Weigand and Friedrich Wilhelm Kullrich
Terry Hess writes:

To read the earlier E-Sylum article, see:
NOTES FROM E-SYLUM READERS: AUGUST 6, 2023 : Emil Weigand and Friedrich Wilhelm Kullrich(https://www.coinbooks.org/v26/esylum_v26n32a18.html)

Breen Quote on Browning Book Sought
David Fanning writes:

Coinage and Currency of Italy under Mussolini
Brad Porter writes:

Breaking Vegas - Counterfeit King
Wayne Pearson writes:

Counterfeiting coins isn't easy--it's an art form! Diameter, thickness, magnetism, weight, design, even the precise mix of alloys--every element of the coin must be perfectly replicated. That means taking on the craftsmanship that the U.S. Mint took years to develop, including anti-counterfeiting marks like "hidden grooves" and uniquely serrated edges. Most wannabe counterfeiters quickly realize they're no match for the U.S. Mint--and often satisfy themselves with crude tokens that might stretch their winnings by a buck or two. But not Louis Colavecchio...not by a long shot!

To watch the episode on Internet Archive, see:
Breaking Vegas S1E06 - Counterfeit King(https://archive.org/details/breaking-vegas-s-1-e-06-counterfeit-king)