Nimcha Questions

[Rick]

I've always wanted to add one to my collection ; and now I have .
This one has been around the block but seems pretty darn old .

I've got a couple of questions about it that maybe the membership can answer for me .

The sword is 40 1/4" oa.
The blade is 33 1/2"
False edge is 9 1/2"
Width of blade 1 5/8"
Thickness at spine 3/16"
There is a wide shallow fuller the entire length and the narrow fuller that is obvious in the pics .
This is a big , heavy sword , the hilt is Rhino .
An obvious repair is present .
I have read that these swords were trade blades from Europe .

Now for the questions :
What style and era is this type of blade ?
Can anyone identify the maker's mark ?
I have a suspicion that the blade may be 18thc. or earlier .
Can anyone confirm or deny this ?

Have at it !