I have these 2 pots with EPNS lids signed on the base D & G WARE STOURBRIDGE Made in England, the only reference I can find on the internest is on the Great Glass Web site which mentions the Company as, The Decorative Glass Company of Stourbridge 1920 / 30, I am not sure of A H Guest, the company made transfer prints and enamelled items sealed between 2 layers of glass, these 2 may be mustard pots.
I think I have only ever seen one other piece a larger blue pot with a butterfly design.
Any other information would be appreciated Roy