A person who shall wilfully alter, remove, or obliterate the name of the maker, model, manufacturer's number, or other mark of identity of a pistol or other firearm, shall be guilty of a felony, punishable by imprisonment for not more than 2 years or fine of not more than $1,000.00. Possession of a firearm upon which the number shall have been altered, removed, or obliterated, other than an antique firearm as defined by section 231a(2)(a) or (b), shall be presumptive evidence that the possessor has altered, removed, or obliterated the same.