Found in the warehouse of my grandfather, who was an electrician. It's from around the 1960s, but I don't know how to use it. This is a long-term storage item, intended for enthusiasts, so please refrain from bidding if you are sensitive to such items. NEC Sylvania green lamp tester, with two connection terminals. - Brand: NEC Sylvania - Model Name: Lamp Tester - Color: Green - Power cord length: Approximately 1.5 meters - Connection terminals: 2 connection terminals - Condition: Minor scratches on the exterior Thank you for viewing. Mid-century Space Age Postmodern Vintage Pendant light Ceiling light Antique Retro Pop Miscellaneous goods Living room Dining room Interior Display wood Lighting fixtures Fluorescent light Taisho era Meiji era Showa retro Glass door Taisho Roman Vintage Vintage Interior Mid-century Japanese glass Old folk house Japanese chest of drawers Japanese furniture Antique art Interior Furniture