? Civil war era knife

My knife gave me this many years ago. I think it has the correct age for civil war but may have been ruined but someone putting CSA in car-touche at end of hilt. Your opinions are appreciated. thank you
I tried to up load images of blade and hilt but files are too large to post.

 

looks like a classic boot dagger, & at 1st glance I'd say gold rush era.....but it does need more research...

I don't think CSA rings true......but again just quick 1st impressions late fri night.!

 

can you pull any markings off the blade??

 

The 19th century Sheffield at the left ....is of a similar style...the 3rd from the right....also....but larger than yours......I think....seeing as how you haven't provided any dimensions........

 

Need much better photos for an ID job like this IMO. After that someone with some experience could probably guess whether home-made or commercial. If latter, then age could be guessed. If former, it would be very hard to date it accurately. These hard jobs become impossible lacking sharp, well-lighted photos.