I took my father to see the original in Tokyo today. It's a sight to behold and worth a look next time you're here. You can also watch a Sumo match nearby.
I saw an original copy yesterday in the Boston Museum of Fine Arts, along with the 50,000 piece LEGO version! They have a large exhibit about Hokusai, along with many of his contemporaries such as Hiroshige, works from his students and teachers, and many many examples of how the Great Wave has been reflected in art and culture over the years. They didn't have this beautiful little 1-bit piece though.
The original are the woodblocks (it’s multi-colour, so I assume there were multiple blocks). Those wouldn’t show the full picture and would have been worn down, if we still had them. We don’t, though. The next best thing would be prints made by the artist.
Edit: nowadays, artists write things like “3/50” on their prints (meaning they made fifty prints, and this is the third). That informs collectors/drives up prices for the low numbered prints.