Dear Luke,

Thank you for contacting Mearto with your appraisal inquiry.
The presented object appears to be British Pattern 1888 Mark 1 Knife Bayonet including the scabbard. Not all hallmarks are clearly readable but this piece was made probably August 1893 by Sanderson in Sheffield. Beside other marks, on the handle, there is a Government acceptance mark and on the blade a Crown and VR which stands for (Victoria Reginia) (Queen Victoria).
The blade and the handle are in medium condition and there are little damages visible.
An estimation would be between 60 to 120 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With kind regards,
Georg