The term `surveillance film´ is not well defined. If at all. To my understanding it means an emulsion of wide exposure range, coated on a PET base, sold bulk only and often some extended red sensitivity. (I’m speaking of B&W.) Now, what is that “FUJI Color Surveillance Film ISO400 TAC 130µ” about? Just their Superia 400 emulsion coated on a slightly thicker acetate base? Their common base is acetate of 122µ.