OK here are two coins that seem to be common enough. Are they? Photos are rather less than I'd hoped, and the two graded MS64 and MS63 at PCGS & look better than photos and very lustrous:
Go to NGC World Coin Guide. It lists 4 types and all are over $200.00. The die #30 coin is a 1878/7. Die #6 is an error: DRITANNIAR…$2,925.00 in MS63. There is a proof listed too. I’d say they are valuable enough to do your homework and check it out.
When I saw the title of this thread I was ready for the usual well worn examples that some chancer was expecting to make a fortune from. But those two are stunning, and both rarer varieties too! Well done! To the right collector they should both be quite valuable, particularly the Dritannia variety. Coins of England 2025 gives that one £1250 in EF, and yours is all of that.
LOL, of course I know what they are as I bought them from Spink many years ago on their once-great SNC circular; as it is past history I will say that I was well-connected at one time and could get many coins at pre-release & got many I had no business owning (also had a very good budget at that time). Those book prices are likely meaningless if they were ever to come up at auction. I just like to post "sleepers" as we sometimes call them in the car world. Also with better 19th c. GB gold coins going through the roof, there are some very respectable bronze/copper and silver coins that have not gone ballistic (yet).