Need help identifying “daggers?”

Hello I recently purchased a home a few months back and we found a bag with some coins and what appears to be daggers. I’m pretty good with the coins but antique items (if these are antique that is) I’m terrible with. Here are the 5 daggers I found. They appear to be ivory but I’m not sure as I’ve never seen ivory in person. I did check with a scope and didn’t see anything google said would imply it was bone but I’m not too sure.

 

Those look like letter openers to me.

Debora

 

That I can see being true for the opal one but the others are too thick a blade for a letter opener. The Kris and Opal one are thin so thats plausible but the other 3 are twice as thick as a steak knife so I doubt those 3 are letter openers also given the handle being massive on the bigger one it wouldnt be reasonable to use it as a letter opener imo. But again, im not proficient in these things.

 

Found the big one out, was a antique Japanese tango knife. Same as this
https://www.invaluable.com/auction-lot/antique-japanese-tanto-knife-136-c-a074641b8a
but with a different design I guess, guessing the other 2 are generally the same but I’ll keep looking. If anyone else knows specifics I’d appreciate it

 

https://www.henrysmilitarycollectables.com.au/products/sold-items/japanese-fan-tanto-sold.aspx

I can not speak to the price, or the age , but to me this is still a letter opener .

Oh...and that's Tanto !

better help on the others requires better photo's....and sizes, and any markings noticed.

 

The other two Tanto's look to be early tourist items ,but the one one the left shows a proper blade.....and may be of better quality than the other.....even to the point of it being a defensive weapon.

 

Thank you for the help, when I get off work ill take a few more pics and look a bit harder for some markings. The only ones ive seen so far are on the kris with initials JV.O.

 

Welcome to Antiquers, @Devin757 . I'm glad to see that @komokwa found this and commented!

 

@the blacksmith may have thoughts here as well....