I'm led to believe it emanates from at least the early 1970s, although I suspect it may be older.
Vaunted as a combined bite indicator and self-striking device, it is perhaps the most lethal gadget I have ever seen.
I have not dared to mount it on a rod or attempt to set it up. Even in it's badly perished state, the rubber tensioner still packs an alarmingly powerful punch!
I seriously doubt whether anyone foolish enough to have purchased 'Frank's Sure-Striker' could possibly have used it and ended the day with a full compliment of front teeth!!
![Surprised :shocked:](./images/smilies/icon_confused.gif)