Carl, the OP said he was filing a 1065 (Partnership). When a partner contributes a depreciable item to a Partnership, the Partnership picks up the depreciation where it left off. So because of that, the "placed in service" date sort of *IS* before the Partnership began.
But as I said before, if you use the date the Partnership began (10/10/15) and leave the "prior depreciation" BLANK, it should calculate the correct current year depreciation.
