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- 04:54, 17 April 2022 CritterCompiler talk contribs created page File:Harrison-h4-diagram.jpeg (Diagram of a Harrison H4 Chronometer rated at Bidston Category:Instruments)
- 04:54, 17 April 2022 CritterCompiler talk contribs uploaded File:Harrison-h4-diagram.jpeg (Diagram of a Harrison H4 Chronometer rated at Bidston Category:Instruments)
