I'm selling this as I have no use for it/know what it does.
It's sold as-is because I probably have no way to properly test it.
The little "bulb" filament is hard to see on the photo but it's there and all the other components seem okay.
Price is 50€ (shipping not included)
Feel free to ask for additional photos or shipping quote.
edit:Here is a pdf referring to maybe newer models the closest being the EL-1200 as it's also 1V / 50Ohm.
https://www.valuetronics.com/Manuals/Precision%20Measurements_EL%20Series.pdfThanks!