I always get asked about knuckle block planes. Stanley, Sargent, Union, and many others made a knuckle block and they made them for many other brands. Some never have a name stamped other than the cutter. These often got changed or lost.
So who made that block plane (other block plane post)
Here are some clues
Sargent Knuckle Blocks
![clip_image001[1] clip_image001[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0011_thumb.png?w=800)
![clip_image002[1] clip_image002[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0021_thumb.png?w=800)
![clip_image003[1] clip_image003[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0031_thumb.png?w=800)
Union Block Planes
![clip_image004[1] clip_image004[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0041_thumb.png?w=800)
![clip_image005[1] clip_image005[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0051_thumb.png?w=800)
![clip_image007[1] clip_image007[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0071_thumb.png?w=800)
![clip_image006[1] clip_image006[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0061_thumb.png?w=800)
Stanley Block Planes
![clip_image008[1] clip_image008[1]](https://i0.wp.com/www.timetestedtools.net/wp-content/uploads/2016/09/clip_image0081_thumb.png?w=800)
Siegley (Stanley made)


Ohio Tools (along with some Keen Kutters made by Ohio Tools)





An Ohio Made Keen Kutter Block Plane

