Visimax Hollow Cathode Lamps Na, K, Si, and Zn Four in All

Description

Visimax Hollow Cathode Lamps Na, K, Si, and Zn all filled with Neon. Picked up at an auction along with other items in a large box. I believe they are new but cannot guarantee it. Not sure how to tell if they've been used. Very clean on the inside. Four total as follows; Na - Cat no 63059 Nor Op mA 5 nor max mA 10, K - Cat no 62863 Nor Op mA 7 nor max mA 10 (appears to have 2 small cracks in inner ceramic but appears to be pencil mark as it does not go through the ceramic layer after viewing under magnifying glass), Si - Cat no 62939 nor Op mA 12 Nor Max mA 25, Zn - Cat no 62811 Op mA 2 Max mA 20 Please ask questions or request additional pictures if more information is needed.