Herley / Siemens model HDA312 / 5850578 Rev E RF Driver. Serial number H1446. Used. Low hours (display reads 3730 hours). See detailed photographs showing device startup. One corner on the front is slightly bent. Case seals are intact but extremely fragile; we caused a small crack along one of them while taking photos (compare first photos to last photo). We will install our own seals in addition before shipping.