Z. James Belt was a wholesale druggist. He apprenticed under E. Bringhurst. They were probably the most prolific Druggist of there time and being as such many bottles were made. They are very common and come in different variants. Your bottle looks to be Late 1800's.
Nice finds, congrats on starting in on the delaware bottle craze. I have probably about 20-25 different Delaware bottles in the store now, nothing too rare, but some nice ones none the less.