"Taka no Ha" or Hawk Feathers, this is a crest used by some Japanese families back in feudal times. This stamp can be used with many materials, leather, wax, or ink. Please consider which medium you will be using the stamp for when selecting the material.
For Leather: Stainless steel
For Wax: Stainless Steel or Grey Robust
For Ink: BS&F, WS&F
For looking good: Gold Plated Glossy or Matte