A person who collects shells is known as a conchologist.
A numismatist is someone who collects coins and/or medals a numismatist
Yes, there are as well as people who collect other types of cartridges. Both the loaded type of shotgun ammunition and the empty 'hull' of a shotgun shell. If it exists, there is probably someone who collects it.
a person who studies and collects mollusc shells as a profession or hobby paula
Someone who collects beer bottles.
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A catapultist.
someone who collects umbrellas
Memorabilian.
hoarder!
A person who collects flags is known as a "vexillophile." This term comes from "vexillology," which is the study of flags, including their history, symbolism, and usage. Vexillophiles often appreciate flags for their artistic designs and cultural significance.
A button collector??
Numismatist