These are pretty rare, and this is one of the best units for UV monochromatic work that is available. other deuterium sources are scrounged from UV-VIS devices or AA spectrophotometers which have been broken up.
Of course you can buy one new and pay lots more than this but the newer units are not as nifty as this one.
|Lamp with vent stack removed|
|exit hole, with filter clips|
|power supply connector|
|This unit is pristine|