Minton (?) 'Floral Ribbon' serving plate

Hello, I'm trying to identify this small (8.5" x 7.5")
transferware serving plate and have had no luck in identifying the plate's backmarks, impressions or shape. I was told it was made by Mintons but the marks don't match those I have access to.

As the photos show, the plate is marked 'Floral Ribbon' which I presume is the pattern. Impressions include 'B B' (best body?) and 'New Stone' and some symbols plus some red hand lettering. I'm presuming the impressed symbols are read the same way up as the New Stone impression. Don't know if the red lettering is read this way or is upside down to match the 'Floral Ribbon' mark. If it's the latter, is it indicating 21 April and a Minton year date of 1868?

The U or horseshoe shaped impression under the red lettering has 6 raised dots in it, possibly 7. There are no internal marks in the middle symbol or crescent.

Any guidance or suggestions as to identifying its manufacture and age most welcome.
Thanks
Tom

 

The horseshoe is the date code for 1853, according to this chart: https://antique-marks.com/antique-minton-marks.html
I found a tureen in the Anemone pattern with the same marks: http://www.blueandwhite.com/museum.asp?m=Minton&p=Blue