Mono, four gold plated solder lugs, switched. With black plastic nut. Gold plated solder lugs and switching contacts. Highest quality. Made by Cliff UK.
1/4 inch Cliff jack stereo vintage style with gold plated contacts. Stereo input, 6 pin connectors, switched. Metal ferrule, vintage style. Used in several British amps.
Neutrik NSJ12HF-1 stacking PCB mount, high quality 1/4 inch (6.35 mm) jacks. Highest mounting density. Two jackes stacked on top of each other. Fits into rack element of 1U height.