I was keeping this as part of my Showa retro collection. Due to the positive feedback from my previous transaction, I've dug these out from storage (I found several; I remembered buying these unused back in the Showa era, when they were stored for children's camping trips by the local children's association, which has since disbanded). Due to the nature of the product, I believe it's built to be durable, but please check the operation yourself. The box is fragile. Please be aware of age-related deterioration.