Can anyone identify this maker mark?

I just got this WWI German Ks98 style trench knife bayonet. It has the standard Imperial era blade with a large full size bayonet functional hilt. It is polished steel not nickel plated. I have not ever seen this manufacture's Bull logo. Can anyone shed any light on the manufacturer?

I looked through some Imperial makers closet thing is Arnholdt Brouch which is a charging pig similar but that does look like a bull could also be a distributor mark and not a maker? Being on a trench knife style that is possible as the majority were private purchase and not issue especially the KS98 bayonet type made in trench knife form nice piece and going up in price these were sleepers for years now quite popular and collectible. timothy

Timothy, I think you may be on to something! Looking at the mark again what I thought were horns are actually ears. In fact they really don't look like horns at all. Also the animal has a very flat nose and a very large body other pig traits. I can certainly believe this animal is a pig vice bull. thanks Jeff

Same opinion looks like Bull. b.r.Andy