Hello, I live next to a lovely little flea market in the UK. Found this plate which has some damage for a couple of pounds. I’d like to try and narrow down the date it was made. My research is the database suggests that seaweed borders were common 1830-1860. It’s a large meat platter. No printed mark on the back, just impressed numbers. Any suggestions as to date and dare I dream of the pattern name and / or maker? Thanks in advance.