John Aitkin and Son? - butterfly brooch

[Luci]

Hey, there!
Today I've found that little brooch. It is marked with "JA&S" "Sterling Silver".
It might be John Aitkin, but all the hallmarks I've found look quite different. Could anyone help me, please?

[dognose]

Hi Luci,

I've seen the mark attributed to a James Atkins & Son of Birmingham several times in the past, but have yet to see an advertisement or anything else to confirm it.

Trev.

[Luci]

Thanks, dognose!
I've also seen this mark attributed to atkins on eBay, but the hallmarks look quite different and that's why I wanted to ask you. Hm...
I hope, James Atkins can be confirmed by somebody.

[Luci]

Thanks, dognose!
I've also seen this mark attributed to atkins on eBay, but the hallmarks look quite different and that's why I wanted to ask you. Hm...
I hope, James Atkins can be confirmed by somebody.

Is there also a "John Aitkin"? I've found that name as well...