Ariel, this is an intriguing ponderance! and I visualize you in a winged tufted leather easy chair, wearing a smoking jacket with your snifter of cognac in one hand and trusty 'Elgood in the other.
Actually I think you are pretty much on target, and its always fascinating when we get these 'in between' transitional cases. The Deccani classification as you know is an extremely broad conundrum in analysis of hilt forms, and Elgood notes it is particularly difficult to attribute them with certainty to specific states.
However it would seem most likely that these 'middle' swords with the Mughal type hilts retaining the 'winged' feature of the Hindu khanda would have been from Deccani regions.
The Hindu's were of course reluctant to relinquish certain features of their traditional swords' hilts as these often were key to apotropaic imbuement as well as religious symbolism.
As the Mughal Sultanates took over, many of the Vijayanagara types of hilts were likely amalgamated with the Mughal forms as these weapons filtered through the Bijapur regions.
I think the 'tegha' you mention from the Elgood article was listed as 17th c. so it would seem this time frame may well suit these unusual hybrids.
Well that's my take, think I'll grab a long neck!!!
