Liconix helium-cadmium laser, comprising of power unit model 4207N, 125mm x 155mm x 620mm. Made in 1984 and laser unit model 4300, serial No. 9005081 made in 1990. Made by Liconix, 1390 Borregas Avenue, Sunnyvale, California 94086. With instruction manuals. Liconix helium-cadmium laser and power unit 1984-1990