John Harrison Geocoin
A commercial geocoin commemorating John Harrison and his invention of the marine chronometer, which could determine a ship's longitude.
Size: 44 mm | Weight: 37.5 g
All geocoin photos are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.5 License. Attribution is required for personal use. Absolutely NO commercial use allowed!
If you see your coin issue here, I am happy to supply you with any size image you request.
