"2. On this common weight standard the coinages of the contracting states shall be in accordance with the two systems in existence among the said states, viz. by thalers and groschen, according to the 14-thaler (or Prussian) system; or by gulden and kreutzer, according to the 24-1/2-gulden (or South German) standard. For the purpose of assimilation or equivalating, the thaler to be reckoned = 1-3/4-gulden, and the gulden = 4/7-thaler. "3. The 14-thaler system to be that of Prussian Saxony, Hesse, Saxony, and Saxe-Altenburg, Saxe-Coburg and Gotha (Gotha), Schwarzburg-Rudolstadt (Unterherrschaft), Schwarzburg-Sondershausen, and Reuss; the 24-1/2-gulden system to prevail in Bavaria, Würtemberg, Baden, Hesse, Saxe-Meiningen, Saxe-Coburg and Gotha (Coburg), Nassau, Schwarzburg-Rudolstadt (Oberherrschaft), and the Free State of Frankfurt. "4. Each state will confine its mintings to such pieces as prevail in the system of which it forms part. "5. In larger specie, and also in divisional coin, each state to bind itself to exercise the greatest care to preserve the standard and weight. "7. For the purpose of the commerce of the contracting states _union_ or _convention_ coins (_vereinsmünze_) shall be minted seven to the mark of fine silver, at an equivalence of 2 thalers or 3-1/2 guldens, fully tenderable throughout the Union. "8. Alloy to be .9 silver, .1 copper; so that 6-3/10 pieces = 1 Mint mark in weight; remedy = .003. [Sidenote: THE DRESDEN CONVENTION, 1838] "9. From 1st January 1839 to 1842, at least 2,000,000 of these _vereinsmünze_ to be coined, one-third part each year, and by the various states _pro rata_ of their population. From 1842 onwards, in case of no new treaty, the rate of minting to be two millions _vereinsmünze_ every four years, _pro rata_ as before; each state to give an account of its mintings. "10. Also of their separate trials of standard and weight. "11, 13. None of the contracting states to set its particular internal specie at any different value except on a three months' notice, and to renew its currency at face value in case of depreciation. "12. The states bind themselves not to issue divisional coins in excess of such _pro rata_ requirements as above. "14. For the divisional coinage the standard of the convention of Munich, 1837 (viz. 27 gulden), is adopted. "18. The treaty to endure till the end of 1858. States intending to retire then to give two years' notice. From that date, if not discarded, the treaty to be periodically renewed (five-yearly)." This treaty continued in force nominally until the later and still more famous convention of Vienna in 1857, before which date Hanover, Brunswick, and Oldenburg had also given in their adherence to it. At the time of the Mint Conference and Convention of Vienna, therefore, there were, broadly speaking, three competing systems in Germany, viz. of Austria, Prussia, and South Germany or Bavaria.