Are these Heresey ll's or HWO's?

HWO and HIIWO are the same thing, just a different production run.  HWO = Heresy. HIIWO = Heresy II (WO = Walnut Oil).  What's the serial number?

Those pictured are Heresy I's in what look like stained Birch cabinets. The H-II's don't have a removable back panel and all drivers are flushed mounted and removable from the front. The original Heresy and Heresy II (H-II) use different mid drivers, horns, tweeters and crossovers- the original Heresy uses the Heritage mid driver and tweeter, same as the Klipschorn, where the H-II uses the extended Heritage mid and tweeter, same as the forte.