Welcome to KF!!!
I'm no expert, but the handle looks odd, to me.
All the ones I have seen had a slightly "mushroomed" butt cap and a palm swell. I think most had grooves in the handle for grip.I have seen one without grooves....a special model for UDT teams...it had a bright blade AFAIK.
I will be interested in more opinions.
If you want to win an argument, it is best to stick to the truth.....or,at least, provable untruths.