Optimum, Vacuum Cleaner, models:

OK-1420	Operating Instructions Manual
OK-1580	Operating Instructions Manual
OK-1640	Operating Instructions Manual
OK-1643	Operating Instructions Manual
OK-1655	Operating Instructions Manual
OK-1690	Operating Instructions Manual
OK-1844	Operating Instructions Manual
OK-2033	Operating Instructions Manual
OK-2090	Operating Instructions Manual
OK-3000	Operating Instructions Manual
OK-4140	Operating Instructions Manual