Yes, on page 38 the comments relate to pls.35, 37, 38, and 40 as a group, saying further experiments were pursued in relation to colour and basic design. Pl.40 is the bowl that looks like the op’s but pl.38 is a yellow vase that looks like it could be uranium so maybe uranium was still in use? The jug pl.34 is uranium although it doesn’t say when that was made.