Is it unicorn? If so it could be Schwäbisch Gmünd. 12 Loth was not uncommon. Cannot tell if your pendant is really 18th century. Is the crucifix enameled? Champleve? Regards
Right,more likely the first half 19th century. Enameling is interesting.If it`s champlevé, black cross should be carved to create a ``cell``, filled with vitreous enamel and then fired. The figure of Jesus should have two prongs inserted through holes bent in the back.