(1) The delivery of a bequeathed thing is also deemed to be impossible if the thing is combined, intermixed or mingled with another thing in such a way that pursuant to sections 946 to 948 the ownership of the other thing extends to it, or co-ownership has arisen, or if it has been processed or transformed in such a manner that pursuant to section 950 the person who produced the new thing has become the owner.
(2) Where the combination, intermixture or mingling is carried out by a person other than the testator and where the testator has acquired co-ownership in this way, co-ownership is, in case of doubt, deemed to be bequeathed; if the testator is entitled to a right to take away the combined thing, this right is, in case of doubt, deemed to be bequeathed. In the case of processing or transformation by a person other than the testator, the provision of section 2169 (3) remains applicable.