What is very interesting is I can find "similar" pitchers BUT the bottom says "Wedgewood" "Made in England" and yours says "Logwood" "Made in England?" I searched a bunch and only found one (but not a pitcher) with the design.
I did a little poking around - Can't help much, but your piece is post 1910 per Made in england mark - likely the single letter stamp is a makers mark as date code were 3 marks. Not all pieces had date marks.
Looks like honest wear on bottom - value will depend on rarity of pattern/shape and condention ie no chips et al.
I would post on a pottery board for a evaluation by collectors.