The mintage of the coin is 5000 pieces. The coin surprised collectors with it sporting a gold plated design, while previous announcements did not hint that such will be available. The interesting fact here is this will be the lowest ever mintage for a Bulgarian gold plated coin. The coin has an interesting, original and different design. We expect a serious interest in it by Bulgarian commemorative coin collectors. The obverse of the coin features the logo of the Bulgarian National Bank with its year of establishment 1879 written on the ribbon. Around it is the inscription "Bulgarian National Bank", the year of issue 2010 and the nominal value of the coin - 10 Leva. The reverse of the coin sports a gold plated reproduction of the seal of the Bulgarian Secret Central Revolutionary Committee, established in Plovdiv in 1885. Around it the inscription "125 years from the Bulgarian Unification" is placed. The Unification of Bulgaria was the act of unification of the Principality of Bulgaria and the then-Ottoman province of Eastern Rumelia in the autumn of 1885. It was co-ordinated by the Bulgarian Secret Central Revolutionary Committee (BSCRC). The Unification was accomplished after revolts in Eastern Rumelian towns, followed by a coup on 6 September 1885 supported by the Bulgarian Knyaz Alexander I. The BSCRC, formed by Zahari Stoyanov, began actively popularizing the idea of unification by means of the press and public demonstrations in the spring of 1885.