The SRD1000 is a superconductive reference device that generates 10 reference temperatures between 10 mK and 1200 mK. The reference temperatures are provided by the superconductive-to-normal transitions of 10 different reference materials included in the SRD sensor. In the frame of EU project "Ultra-Low Temperature Dissemination," four SRD1000 prototypes were transferred to as many labs for evaluation. Each lab independently performed extensive measurements on the assigned SRD1000 prototypes: residual magnetic field tests, repeated observations of the transitions under specified controlled thermal conditions and determination of the transition temperature and transition width of each transition. The results of the evaluation are reported in this paper.