Thanks for the additional information. It is not unlikely that all of these swords (not considering the ones in the picture of the shop itself) were collected in Burma, since the Shan items likely come from the Shan States in Eastern Burma. The odd man out is #1, which I am pretty sure is a Lanna style, which would make it from the region further east, around Chiang Mai or Luang Prabang. However, given the constant warfare between Burma and Thailand, it is not unreasonable to assume this one made its way into Burma as a spoil of war. #11 I see has an ivory handle, so it is very like the one on my web site. An #13 is a sword stick, huh? I have no data on those. Perhaps a travellor's or merchant's weapon? Or one made for a European? Its a pretty nifty piece, though.
I see from the descriptions page that there are also pieces from Siam in the catalogue. Any chance of getting a look at those?