That might me a Carcano bayonet. I seem to remember the Arisaka type 99 bayonet had a curved quillion. But it sure looks like a last ditch 99 bayonet

Last edited by kaywoodie; 12/23/20.
Founder
Ancient Order of the 1895 Winchester

"Come, shall we go and kill us venison?
And yet it irks me the poor dappled fools,
Being native burghers of this desert city,
Should in their own confines with forked heads
Have their round haunches gored."

WS