Williams BT-** Modular Ratchet Assembly

[Luziman]

In my tool collection, I found this particular 3/8” drive ratchet assembly. Its made by Williams (it’s stamped with ”W” inside a horizontal diamond). It’s very modular and every piece fits together a multitude of ways. The item #’s are: ratchet head BT-50, drive adaptor BT-150, double end extension BT-104, handle BT-70, flex adaptor BT-40, short adapter no ID.
I’ve never seen anything like it. Can anyone help me place this tool and what year it was manufactured?

 

[KnurledNut]

Nice find!
I have one of those ratchet heads. Very unique piece.
With a 30" extension it makes for a super long reach 3/8 ratchet.

 

[3baygarage]

Hi. The Vulcan catalog dated 1964 has them. I don't what years they spanned.

 

[3baygarage]

https://www.garagejournal.com/forum/threads/j-h-williams-vintage-hand-tools.274782/post-7399715

 

[Luziman]

I didn’t realize Vulcan was a JH Williams brand.
3baygarage- thanks for helping me to roughly date them. Now I may be able to find the correct extensions & sockets to pair with it.