New Varian Tube never been used just recently unboxed 

The Varian B-700 Series of side window tube units 

Filament Characteristics :  13 Volts, nominal 4.5 Amperes, Maximum 

Focal spot 7x7mm

Beryllium Window 

kV range -60-100 kV 

Cooling tap water  

This tube unit replaces and interchangeable with Amprex types and also Philips FAA/Q/60/3.5tube units which incorporate Philips PW 2180 to 2189 series of X-ray tube insert