For all the vintage photography enthusiasts out there, this Densi-Timer PTM-4 from Lextra Laboratories is a must-have in your darkroom. With its reliable performance and accuracy, it has stood the test of time and will surely enhance your film developing experience. The timer is specifically designed for darkroom use and has been manufactured by the renowned brand Lektra. It is suitable for both professional and amateur photographers and is compatible with a variety of film types. This timer is a rare find and would make a great addition to your darkroom setup.  Powers up but not sure how it works.   Untested Selling as is for parts or repair.