Hallmark Research Institute
|Address:||San Francisco, CA|
|Books by this publisher:||World Hallmarks|
The Hallmark Research Institute (HRI) was founded by William Whetstone, Danusia Niklewicz, and Lindy Matula as a means to further the understanding about world hallmarks through lectures and their publications “World Hallmarks – Vol.I – Europe, 19th to 21 st Centuries” and Vol. II – covering Asia, Middle East, Africa, Australia and the Americas.