In all cases where mortgages or deeds of trust on real estate with power of sale have been foreclosed pursuant to said power by proper advertisement and sale in the county where such real estate is located, notwithstanding the wording of such mortgages or deeds of  trust providing for advertisement or sale, or both, in some other county, or at some other particular place in the county in which the real estate is located, which place was in fact designated in the notice of sale, all such sales are hereby fully validated, ratified and confirmed and shall be as effective to pass title to the real estate described therein as fully and to the same extent as if such mortgages or deeds of trust had provided for advertisement and sale in the county where such real estate is actually situate. (1951, c. 220;  1961, c. 537.)