Help with Sheffeild sugar bowl & creamer jug

Found a silver sugar bowl and a creamer jug. I want to list these items on eBay. Looking for help with the description and value of the pieces. From the research I’ve done, I’ve found that they are probably: old Sheffield silver-plate. They look like they are the same style but different makers.

I don’t know what the time period. There are no initials.

One mark is the crossed-keys which may be J. Green & Co. or H. Wilkinson & Co.
I think the other is a phoenix which may be Waterhouse, Hatfield & am; Co

Thank you!

For those who are curious about this query it has been answered most expertly on another forum.

Impressed, as always, thanks Phil.

Thank you