Consignment sale for a collector who is downsizing. Prior to listing it was tested for filament continuity (we found it) and shorts (we did not find any). No further testing was performed. Due to the limited testing and because vintage components can fail at any time it is sold as-is, as a collectible, with no guarantee of functionality or completeness whatsoever.
This is the cheapest tested one on the market - don't let it get away!