It is actually VERY easy. Just think about the 500 modern recordings of Beethovens 9th Symphony. Tell me now what THE (singular) sound should be. It was no different decades, centuries ago. The interpretations - as today were based on respect, intellect, exposure, the performing forces available, the room, the audience as well as perhaps the location. Tuning pitch for the specific locations is researchable by measuring all of the the instruments and coming up with a mean average. With that in mind, we today pick up a historical (not vintage) instrument, its respective mouthpiece(s) and experiment. Lip flesh has not changed much and I am sure that the finest players ALWAYS had a relaxed approach to what they did. Then we simply play from the heart. There may be small differences in vibrato and accepted intonation among professionals between then and now, but the foundation for town band music has not changed for centuries - motivated amateurs! A naive approach with a vast spread of playing qualities in the group probably represents the closest "sound" for town band genre. Many times we discover wonderful things just by having exposed access to instruments and ensembles dedicated to the historical cause. We discover that the theories have no practical application because of other limitations....... Historical is not vintage. Vintage is simply a modern style trumpet built more than n years ago. N is an arbitrary number that has NOTHING to do with manufacturing or construction style. Vintage just means "definitely not new".