This is a Johnson Bros. (“A Member Of The Wedgwood Group”) Willow Earthenware Pasta Bowl. I have not been able to determine the exact age of the piece based on the back mark. If you have information that could help me with that, please let me know.
I would assume that since it does say that it is safe for microwave use but does not say “for over 100 years” – as the other similar piece I have up here on my blog does – that the manufacture date is possibly early 1980s (specifically, before 1983), although this is a guess.
When tested with an XRF instrument the readings were as follows:
- Lead (Pb): 44,000 +/- 1,400 ppm
- Mercury (Hg): ND (non-detect/ negative)
- Cadmium (Cd): ND (non-detect/ negative)
- Arsenic (As): ND (non-detect/ negative)
- Barium (Ba): 545 +/- 78 ppm
To learn more about the concern for lead in pottery and dishes, please click here. As always, thank you for reading! Please let me know if you have any questions!