My grandfather got this puzzle in the 1970's.

[JohnDBarrow]

It was from my mother to him as a Christmas present. It had plastic pieces on a peg board with a hard plastic clear case.

Here is that puzzle for you to solve in digital form. Moreover, how many possible solutions are there to this puzzle? 

 

 

Edited August 7, 2024 by JohnDBarrow

[JohnDBarrow]

Here is my 5x5 version to boot.