Some examples of the Withycombe patent:
Here are some examples as follows (Left to Right):
- Aqua CD 121 with vertical ridges and marked with the Withycombe patent
date
- Light purple CD 143 with spiral horizontal ridges and no markings
- Light green CD 143 with spiral horizontal ridges and no markings
- Aqua CD 143 with vertical ridges and no markings
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