1867 AD., Spain, Isabel II, Barcelona mint, 1 Centimo, KM 633.1.

Spain, Isabel II, Barcelona mint, assayer Oeschger Mesdach & Co., 1867 AD.,
1 Centimo de Escudo (18 mm / 2,40 g), copper, 2,50 g theor. mint weight, mintage ? , axis medal alignment ↑↑ (0°), plain edge,
Obv.: ISABEL II POR LA GRACIA DE DIOS Y LA CONST. / * 1867 * , her laureate head facing r., encircled by dots, date between two 8-pointed stars.
Rev.: REINA DE LAS ESPAÑAS / {OM} / * 1 CENTIMO DE ESCUDO * , crowned shield of arms between laurel branches; beneath, {OM} -monogram, 8-pointed star at either side.
KM 633.1 ; Cal. 654 .

Year / Mint Mark / Mintage
1865 KM#633.3,Cal#660
1866 KM#633.1,Cal#651
1866 KM#633.2,Cal#656
1866 KM#633.4,Cal#661
1866 OM KM#633.1,Cal#653
1866 OM KM#633.2,Cal#657
1866 OM KM#633.4,Cal#663
1867 KM#633.1,Cal#652
1867 KM#633.4,Cal#662
1867 OM KM#633.1,Cal#654
1867 OM KM#633.2,Cal#658
1867 OM KM#633.4,Cal#664
1867 OM KM#633.5,Cal#666
1868 OM KM#633.1,Cal#655
1868 OM KM#633.2,Cal#659
1868 OM KM#633.4,Cal#665
1868 OM KM#633.5,Cal#667

KM#633.1 Barcelona - 8 pointed stars
KM#633.2 Jubia - 4 pointed stars
KM#633.3 Madrid - 6 pointed stars
KM#633.4 Segovia - 3 pointed stars
KM#633.5 Seville - 7 pointed stars

L. FORRER, "BIOGRAPHICAL DICTIONARY OF MEDALLISTS ...":
MESDACH, LOUIS (Dutch}. One of the Directors of the important die-sinking establishments of OESCHGER, MESDACH & C later ESCHGER, GHESQUIERE & C ie , at Ter Kiele (Holland) and Biache (Pas-de-Calais, France).
At one time, this firm owned private mints in Spain, and between circ. 1865-1890, issued medals as well as various coinages in commission for foreign governments. In 1868 the artist Alphee Dubois was in their employ, and during a year's residence at Barcelona, modelled for them the Spanish bronze
coinage of the Provisional government (1868- 1 870), the dies for which were engraved by Luiz Marchionni. The 10, 5,2 and i Centimes bear on one side the monogram OM for Oescher, Mesdach & Cie (1868, 69 and 1070).