Displays in Mystery Teardown EEVblog#960

[m0hxn]

Just seen these displays on eBay: http://www.ebay.co.uk/itm/Retro-Hewlett-Packard-HDSP-2490-5-x-7-Four-Character-Alphanumeric-display-/282674670550

Very similar to the ones in Mystery Teardown EEVblog#960 - https://www.youtube.com/watch?v=oFTPTmZ7pDU&feature=youtu.be&list=PLvOlSehNtuHujYmL_-5CBUg-za2osSUVI&t=1118 . Being sold by some charity or other.

John O