I suspect, and I am no expert on the subject so I hope someone here proves me wrong, that it is a shop made one-off. That someone took a brass trinket of some sort and modified it into a primer by soldering on 2 pipes and a modern 20th century dispenser. The pipes are to run a cord through so you can wear the primer around your neck, a practice some people frowned upon but was popular decades ago I heard? Whatever it turns out to be, it's pretty cool and I'd be happy to own it.