Lets leave the combat/non combat question at the door for a bit.
Its not really key to what I'm getting at.
I'm afraid I really fail to see this as much of a progression from the older Omani sword style. Flat, wider, shorter blades to longer, narrower fullered blades? Not much of a connection to my eyes...
See above - the Omani battle sword doesn't have many similarities. The Yemeni long hilts - lots of trade blades to be found in those...
If your point of view is that the straight sayf is directly related to the Omani battle sword - this makes no sense. The battle sword, at least all I've seen, don't have stamps. Why start on the dancing swords? It frankly makes no difference if the stamps are done locally or abroad - they are applied because they imply something. Quality usually, quality to be found in imported blades. Again, this is not a question of what is done now, it is a question of origins.
Your explanation provides no reasoning as to why stamps would start appearing on dance swords when they weren't on battle swords.
Unfortunately I have the exact same problems still as before. Moving from a flat, broad and unfullered blade to a long, more narrow fullered blade that happens to match up in profile with widely available European exports and have the application of blade stamps which weren't used on the older form (whether local or European in application makes no difference) plus the simultaneous uptake of European curved blades into the same hilt style... Quite a lot of coincidences to just discount I'd say...
What drove the uptake of European trade blades in most regions of the world can be broken down into a few basic areas.
They were widely available, they were of excellent quality steel and the cost was proportional to the first two attributes. Symbolism and status are a natural follow on from the first attributes.
For me, there are still some broad gaps in the theory you've presented and I'll try to distill them once more in bullet form, really I think there are two points to focus on.
- The "coincidence" of triple fuller dance swords appearing at just about the time European trade blades of the same pattern are widely available
- The use of stamps in Oman, even if locally copied. These ONLY can be attributed to an experience of European blades lending attributes to the marks - such as an indication of quality. Otherwise there is no reason for them to be copied and applied.
I'll just try to make myself absolutely clear, this has nothing to do with dancing, pageantry, combat or non combat. It's simply a question of where the blade form came from - no matter what the modern iterations are.