The Thamar Bahadur Dui Chirra also arrived today, along with the Yek Chirra. They make quite a pair! The top two fullers are deeper, but the blade below the second fuller down to the edge is still slightly concave, just not nearly as much as the top two fullers. Dui Chirra or Tin Chirra, whatever you want to call it, its a beautiful blade! This one weighed 23.3 oz on my scale, and the spine is around 11/32" at the thickest part, half way between 5/16" and 3/8". Just enough heavier to feel a little more substantial in the hand compared to the Yek Chirra. These two blades may very well become my favorite khukuris of the ones I've gotten so far. As soon as I can, I'll post up pics.