No its replica sorry.
I like the dagger. I think this is a good early hewer. Have the number on blade? In the photo the number is difficult to see.
TN number "1831" belongs to an officer dagger; item #27787 recently offered on the JRB&M sales site. I maintain a TN database, numbers run concurrently with officer daggers and EM hewers in a single series. So, as Matty says - sorry, your hewer is a fake for sure.
Number of blade is "18...". Number is badly visible.
Is the etched throat number definitely original? I thought these were always stamped on throat.
Is there a number on blade?
For example ## 1802 and 1855. #1855 very very light, but I think we can trust Paul Hogl about etching number on throat. TN used different method indicated numbers on throat - stamp, etching and etching with stamp. And has different digit stamp for it, but one specimen for etching. Sorry for my bad English.