Denis,
This is a real nice little horn. I always like the ones where the whole horn is 6 or 8 sided. If it were me, whether you are going to use it as a primer or a day horn, I would ditch the little brass valve and replace it with a wooden spout stopper. I think I actually hate those little spring loaded brass primer tips. Might have something to do with me being dedicated to being as historically correct as possible. You might say I am one of those guys who pushes the HC/PC envelope. I am fortunate that the guys I run with are also very HC/PC and always striving to be better.
Randy Hedden