http://www.20thcenturyglass.com/glass_encyclopedia/victorian_glass/pearline_glass.htm
Oh ! You are in the UK ?? That makes a huge difference !! Look at the examples of Davidson glass above !! Sure could be theirs !! The top row third pitcher is quite similar !! They also speak of the yellow color !! There are links to their catalogues if you scroll down !!
https://www.terapeak.com/worth/klondyke-pattern-fluted-scrolls-candy-dish-canary-yellow-vaseline-opalescent/152429167584/
Yes it did !! Was doing some research on this last evening !! I think your company is Mosser Glass Company !! Not Moser but the American company with double S`s !! I think they are in Camebridge Ohio !! Klondyke is the pattern !! See link !! Northwood also made a similar pattern but I think yours is Mosser Glass !! They are not a very old company !!
First link did not work,, try this one !!
Wait on this ID !! I can not find this variation in either Mosser or Northwood,, let me check a few other companies !!
Thank you very much for your time and effort. The person I bought it from thought maybe Davidson but wasn’t sure. He had only seen line drawings and a reference in Heacock many years ago. Such a mystery to me.
No. Unfortunately no marking.