Prior to its publication in the Gen, in 1958, Malcolm Davison had been using this, his invention. So the only date we have for his invention is "prior to 1958."

Unfortunately, its flaw is still evident - as can be seen in the photo of its entry. That flaw is VERY obvious when its actually being used by a performer.

This is a case of something being low priced, but still too expensive. For if it doesn't work, any price is too expensive.

I would not think that this kind of metal blindfold can be titled like that. After receiving the item, the black paint smelled quite strongly but after some time it does not exist anymore. The blindfold is very flexible (this feature is not either good nor bad). Its one side is visibly bent due to technical issues (vertically), I guess, by a manufacturer. It means that the blindfold is slightly asymmetrical. I would say that the quality of the blindfold is OK in general.

A spectator can not examine the blindfold by putting it on his/her head, as the secret is easily revealed in this case. He or she can touch it and see that it is perfectly metallic and without any holes.