These blades decoritive Indian kukris are generaly untempered, they were sold in the west by firms like Bannermans up to the 1930s for wall display, the hilt may possibley be a replacment, most were all steel.
Stu I guess your thinking of Sosson Patta?
Spiral
No not a Souson Patta. This type is shown in Tirri's book and described as I mentioned.
Stu