Hi, Mark, all pics looks ok for me. Please let me know which one's not working and I will repost it.
Your first question 's about similarity between Dahb Utaradit and one from early Rattanakosin era. Geographically, Utaradit and Pisanulok (
BLUE) are major cities southern of Lanna (
GREEN). The cities were self-govern under Siamese capitol (
RED) 's power in both Ayuthaya and Rattanakosin periods. The sword labeled as Dahb from Rattanakosin era (the top one) shared blade similarity with ones from late Ayuthaya era. It 's hypothesized that they have same craftsmanship (same smith guild or linage). Although ones from southern area of Lanna (Utaradit-Pisanulok) have similar art (decoration, style, tip style) but they are different in terms of profile and balance. Its blade profile 's somewhat influenced by Lanna 's blade, narrow "waist", highly-taper-spine. And we agree to put such Dahb in another catagory than Lanna, Ayuthaya or Rattanakosin, even the blades are from late Ayuthaya-early Rattanakosin era.