Genaue Prägezahlen gibt es nicht. Anhand von Stempeln können gewisse Rückschlüsse gezogen werden.
Hier ein Versuch, das Ausmünzungsvolumen zu beziffern :
7.4. VOLUME OF COIN
Some progress can be made towards working out how much coin was
produced. The number of coin-dies can be estimated from a calculation with
three elements.
1. Establishing actual die-numbers and ratios of dies to coins, type by type
for a range of coin-types, after collecting coins or coin-illustrations in
large numbers.
2. Using this information to estimate original die-totals for these coin-types
after modelling large type- and die-samples statistically, by means of
discrete distributions.
3. Using the resulting die-estimates to extrapolate die-totals for entire
populations of types, from the representation of these types in the largest
available hoards.
The results for the reign of Hadrian imply a population of roughly 40,000
silver reverse dies. Gold proves to be more complex. For gold coin, dies were
evidently used at one of two levels of productivity, a high-output category and
a low-output category, whose ratio was approximately 2:1. Hadrianic gold
coin was produced from a mixture of low- and high-output dies. The
estimated total for gold under Hadrian is the equivalent of roughly 530
high-output dies or 1,030 low-output dies. The average yearly equivalents for
Hadrian's twenty-year reign are about 2,000 silver reverse-dies and 25-50 gold
reverse-dies.
The number of coins produced is much more uncertain and will probably
remain so. Judging from parallels and from the fact that in large samples of
coin-finds, gold accounts for about 70% of precious-metal coin by face value,
a possible order of magnitude for production from the central mint under
Hadrian is 16 million denarii and 1.1 million aurei per year.84 At that rate,
precious-metal coin-output would be worth roughly HS170 million per year.
The output of eastern silver and of base-metal coin might have increased this
by about one-fifth, making approximately HS200 million per year.85
This can be no more than a rough order of magnitude, but it suggests certain
comparisons. It makes Pliny's HSIOO million for the annual drain of bullion
eastwards difficult to accept literally.86 It is unlikely that an empire with large
armies to pay could have afforded such a high net loss. And since the minting
estimate is only a fraction of the Empire's estimated budget (p. 45), it suggests
that, year by year, government expenditure must have depended more on tax
revenue than on its ability to produce new coin.
Richard Dunkan- Jones : " Money and Government in the Roman Empire ", Cambrigde, 1994