Keep your home safe with this vintage 1970s door chain burglar alarm. This NOS (new old stock) item is still in its original packaging and has never been used. Made of durable plastic in a classic ivory color, this alarm is both functional and stylish. It was manufactured in Hong Kong under the British 949431 NO. 280 standard.

Easy to install and perfect for any home, this alarm is a must-have for anyone concerned about home security. Its classic design will blend seamlessly with any decor, while its loud alarm will alert you to any potential break-ins. Don't wait until it's too late - protect your home today with this vintage door chain burglar alarm.