For the purpose of making stamps available for use, the city collector shall prescribe,
prepare and sell, stamps of such denominations and in such quantities as may be necessary
for the payment of the taxes imposed by this division. In the sale of such stamps,
the city collector shall allow a discount of eight percent of the denominational or
face value thereof to cover the costs which will be incurred in affixing the stamps
to the packages of cigarettes. In the event the printing by an authorized meter machine
is used in lieu of gummed stamps, there shall be allowed a discount of ten percent
of the denominational or face value of the imprints of said stamps so printed by said
meter machine to cover the costs incurred in printing such imprints.
(Tax Code 1941, § 133(5))