The Nova color paper processor is an ingeniously simple developer.
Three upstanding chambers in a temperature-controlled water bath (immersion heater with temperature control) ensures best working conditions for the development of sheet films in Process C-41 or photo papers by RA. 4
Of course, the Trimate also works with Black&White processing.
After use a cap is placed on the narrow opening or you can drain the chemical at the end of the working process. No sticky rollers but easy to clean. The paper is fed manually by means of a mounting clip.
It's most likely the smallest darkroom for color print developing you'll ever see.