These are probably pieces of the more specialist collectors of Scottish Glass or Uranium Glass.
These two pretty little bowls with made by Monart and both have their original labels, as photographed. They are shape ZA. The labels read X.ZA.238 and X.ZA.239.
They are both of similar size, shape, and colour. One bowl has more bubble inclusions throughout - and the other is more of a clear acid yellow with paler opaque yellow inclusions around the rim.
They both measure: 11 cm in diameter and have a height of 5.5 cm.
These pieces are very rare and you do not find them so often. They are, of course, in perfect condition with no damages and wonderful to still have the original applied paper labels on each.
I am listing these at £90 for each bowl. I would have to send these to you in the UK with Royal Mail Recorded Post. This will be applied to your order at the checkout.