Welcome to QB. It looks like you tried to include some pictures, but they didn't show up. I'm hoping you can get pictures to load. I know there are different size square keys, triangle keys and even skeleton keys. I had a triangle key that I sent to my sister for a friend of hers, but it didn't work. My brother made one for my sister's treadle. I used a square bit for my Weed.
It looks like it is probably square if it is like the one for Jones treadle at
http://helenhowes-sewingmachines.co.uk/locks.html She also has made some square ones that are less expensive. There are also square bits like
https://www.amazon.co.uk/Mesee-Screw...5669509&sr=8-5
We like pictures. In order to post pictures on Quilting Board, you will probably need to reduce or compress the picture to a
file size that is smaller than 2MB. How to post images can be found at
https://www.quiltingboard.com/attach...020-01-17-.pdf
Don't forget to scroll over to the far right to find and click on the "
Upload" button.
I have found that only the big red "Reply" button or "Quote" work to give me the paper clip icon to work for adding pictures.
https://www.quiltingboard.com/attach...p-location.jpg
Some additional info regarding reducing images at post #4 and images for the scroll and upload button can be found at #5 of
quilt block ID?
Or simply - Make sure pictures are smaller than 2MB
Click on red "Reply" button
Click on the paper clip icon
Click browse - choose picture/s. (only 5 allowed per post)
Once they show up as being loaded, Scroll over to the right side and click on "Upload"
After the pictures show up as being attached, you can close that window and go back to the screen to finish posting your post.
Janey - Neat people never make the exciting discoveries I do.