What does this hook do?

[Cypros]

I am a new member to this forum and am a crochet novice and history enthusiast.

 

I recently found an ivory crochet hook in an antique store and was curious about some features. The hook has a hole perforated through it and a triangular notch on the back side of the hook. I cannot think of what the purpose of the hole and notch is. I would think that running the yarn through the hole would cause entanglement. I am unable to find any other examples of hooks with such a hole and notch. Can anybody identify the function of these features? Is it possible that it is not a crochet hook but used for some other textile production?

 

The hook is about 6 inches long. The other end is broken off where there was another perforation. 

 

Any help identifying this tool and how it worked would be appreciated.

[Christy.lee1989]

Not sure what it is but I'm interested in finding out too. I've never seen one like that before.

[magiccrochetfan]

Welcome to the ville

 

It does not look like a crochet hook to me at all. I have no idea what it might be. Sorry!

[Avon Lady]

Don't quote me, but it looks likes some kind of weaving tool!  ???  Hope you find out--and let us know!

[Granny Square]

The top left pic made me think of the shaft of my set of interchangeable steel hooks, the hook tips are flanged, and slip into the notched shaft, there is a little nut that screws over the join.  But, it would be daft to use fragile ivory for this, and there's no threads evident.  

 

And, the top right pic is really mysterious--is that the part you're calling the hook?  I've never seen one open like that.

 

Interesting indeed!

[ReniC]

They look to me like the old "floatlines" fishermen use on their nets to keep them buoyant.