Its known under several names.
Oldelft "
HV5x80AT Mark IV"
or
"
RS4TS"
"OlDelft" is the Dutch manufacturer, they still exist, but make medical imaging instruments nowadays.
You can get practically the same thing (same opto-electronics package, but Zeiss instead of Leitz optics & a slighgtly different control knob layout) by buying one of the "
Zeiss Orion 80 / Fero Z-51" scopes still being sold online.
Here's a link to one on e-bay.
http://www.ebay.com/itm/Zeiss-Orion-...0212_W0QQfviZ1
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