Nice bayoneta de taco, Carlos.
Have you acquired it from a Spanish seller, so that it could be Spanish ? The mark on the ricasso should help identifying its maker and origin but, unfortunately, this symbol doesn't figure in the great work THE PLUG BAYONET By R.D.C. Evans. Still the key to trace it is the pegaso (pegasus) mark on the blade.
You might wish to try and contact Shawn Gibson (
shawnkgibson@yahoo.com ). He knows a lot about these things.