what was the double fixed and swivel brass hook used for ?

[time machine]

I normally Id everything but this brass hook has me stumped. I hope someone has can help.

 

[Paleopilot]

I've seen hooks like that used to hang Steelyards, (scale) for weighing farm goods. Nice find!

 

[Paleopilot]

Here's a pic ....

 

[time machine]

Wow your diagram looks pretty close. I went through alot sites and didn't find anything that matched.

Thank You.

 

[Lafitte Deux]

Here's a pic of a steelyard balance.