Damn, hit the tab key again. so here goes again.
The unit was clearly a Keysight produced unit and showed no evidence of having been opened up or reworked. The unit was recognised by the Keysight IO Libraries. The Keysight software reported correctly my Advantest R3465 SA, HP 5334A counter and 3478A DMM. Have yet to try on other HP equipment as project work is occupying my time at the moment. So far it seems genuine and it works as advertised. Just lucky I guess.
It cost me $115.88 Australian Dollars which is not trading well against the USD at the moment so much cheaper in USD.
John Proctor
VK2DLP