i don't know how much is worth but i had a similar problem after some research i can say uw stands for united Wilson...united Wilson porcelain factory is based in Hong Kong founded 1970's/80's and still operating,i got myself 4 "uw" items and thought 1897 would worth something.anyway gotheborg.com/marks/20thcenturychina.shtml
look on this link as a start point . hope been helpful
How much would an 1897 indain head penny be worth today in 2012
ow much is a 55 plate meriva worth
1897 pittsburgh stove and range fireplace
250.00
$40-60 Australian, depends on what type of plate tho'... If its an oblong shaped Sandwich plate up to $200.
it is worth around 750 dallars
Around 33.00- depends on condition.
I have a plate that is 24kgp,whats it worth
About how much this plate worth
nothing because this does not exist...
nothing
Infinite $$$$$$$$$