The following shall be exempted from the provisions of this article:

    (1)    Dealers in scrap iron, bronze, aluminum, brass and/or precious metals, where such metals are purchased or traded only in lots exceeding four (4) ounces in weight.

    (2)    Dealers buying or trading securities, commodities, bonds or other certificate of value representing or having as its basis a precious metal when same are sold, bought or traded at any exchange outside the city limits.

    (3)    Persons dealing in precious metals solely for the purpose of providing dental, medical or other forms of health care service.

    (4)    All transactions conducted as a part of any coin show where all dealers conducting business at such coin show register with the chief of police their names, addresses, and the communities in which business licenses are held by such dealers.

(Code 1964, § 11.1310)