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WRme2: Suspected and known origins of test bricks
WRme2: Test molds in the production process
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WRme2: Quick reference guide
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WRme2: Test bricks found in the United Kingdom
WRme2: UK test bricks of unknown origin
WRme2: UK test brick - Wrexham(?) - old logo - M (Maxx brick)
WRme2: UK test bricks - Wrexham N and P
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WRme2: Courtauld's Wrexham Test bricks - mold Z
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WRme2: English test bricks, mold Z - Z16