Panasonic FDD number decode?

Has anyone information on decoding the model number suffix on a Panasonic 3.5" floppy drive? The number is JU-257-14PF. I was told it was a 720K drive when I bought it some time ago but it seems to act like a 1.44MB unit. Need to confirm as I want a 720K for an industrial OS-9/68K system I'm thinking of dragging out of storage. Controller only talks 720K. Controllers in PC's use connector pin two, IIRC, to select lo/hi density. Is my drive selectable by internal jumpers for 720k only/1.44MB only (and is there such a drive available in general)? I don't care to hack the hardware on my nice OS-9 system just to make something work. I can find 900+ hits on Google at this moment for the JU-257. Several different suffixes are shown and many indicate 1.44MB capacity. There's but only one with the -14PF suffix which appears in the search under the inventory of Searchlight Tech.com site. No descriptive help there. Methinks this is in fact a HD drive instead of the desired 720K and I was, basically, ripped off. Neither Matsushita nor Panasonic website searches yield anything on even "JU-257". Long obsolete, evidently. Thanks for your help. -Chris F. NNNN Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/