Hello again, I rechecked my some of my images and found this one not exactly the same as your image. Good really though as it makes the the possible identification for your item.
I have identified of this mark as
Broadhead & Atkin of Sheffield. These are definitely similar marks. The company of Rogers
Broadhead and Henry Atkin was said to be dissolved in 1853 and Rogers
Broadhead set up another partnership named "R.
Broadhead & Co". It seems Rogers
Broadhead left the new partnership in 1860 but one of the partners "Benjamin Grayson" carried on the business and the mark "
Broadhead & Co" was still used on some products. Do you think there is a probability your item was made by one of these companies?
Fishless