Making The Diamond Pallets For Derek Pratt’s Reconstruction Of John Harrison‘s H4, The World’s First Precision Marine Chronometer (Part 2 of 3)
Here we present the second part in a three-part series about the making of Derek Pratt’s reconstruction of John Harrison’s H4. This part was written by Carl Murray of Frodsham. This article was first published in ‘The Horological Journal’ (HJ) in March 2015, who we thank for permission to republish on Quill & Pad.