I regularly use the online EMC hosted by the Fitzwilliam Museum in Cambridge to record any early medieval coins I find and as a visual reference when trying to identify such coins. However, I was wondering what percentage of such coins in personal collections ever get recorded in the EMC. I always thought that low numbers recorded was indicative of a coins rarity, but that might not be the case if many haven't been recorded. I would be interested in your views on this. My rarest entry in the EMC is a Henry 1st type x penny minted by ANDERAM at Leicester (ANDERAM ON LEI) with NL ligated. Prior to my find, ANDERAM was unknown as a moneyer. Its reference is EMC 2000.0078. Another example has surfaced since then. On visiting the museum to show my penny to Dr Martin Allan, I was fortunate to meet Mr Bill Conte, the owner of the best Henry 1st collection ever formed. He was visiting the museum with the aim of selling his collection to the museum with the aid of a National Lottery grant.
I've never heard of this site, so I poked around a bit. Very interesting! I don't own many medieval coins, I think only two. I think it's really neat how people report their finds.
The EMC is a great repository of information on early medieval coins. I used it recently to help me identify 2 cut quarters of Ethelred 2nd that I found with my detector. One was a long cross type and the other a helmet type. I have since recorded my finds on the EMC.