The Court of Appeals held that John Deere's purchase money security interest in certain farm equipment did not attach and therefore was not perfected until over twenty days after Sam Ritter, the debtor, took possession of the equipment. 179 Mich. App. 580; 446 N.W.2d 340 (1989). Thus, since John Deere's perfected security interest failed to qualify for special priority status under MCL 440.9312(5); MSA 19.9312(5), the Court of Appeals held NBD'S security interest in the same collateral by virtue of its "after-acquired property" clause had priority.