Here's your set -
http://www.replacements.com/webquote/THAMOR.htmthese are high retail replacement values, wonderful for insurance purposes - for you to sell, expect to reduce your price by 1/3rd to 1/2 - these reductions are not set in stone however. Moss Rose is a popular design with many companies and over the years -
I couldn't find any info on the company, as to whether it's English, or not. You didn't mention a country of origin, so assume USA? Any other info on the backstamp? And is the tea set marked the same, Thames? KB