The last mark was the sceptre (Feb 1647-1649) although only one such coin was represented (in Pot C). The hoard consisted of three separate pots and the last coins in the other pots (A & B) had the sun mark (Nov 1645-Feb 1647) suggesting the last was buried subsequently. More details here in the British Numismatic Journal pp 84- BNJ 64 pdf Please note the pdf file is large (176 MB) so might take some time if you want to download it! Thanks! Tom