Thanks, Miffman, for responding. Miffman is correct - it holds one BTC and one BCH. If you need further help, please don't desitate to ask. 
JV
Yes, it means it holds 1 BTC and 1 BCH. To check the balance, you will punch in the first bits you see in the middle of the hologram on here: https://casascius.uberbills.com/ or search it on the signed list provided on casascius.com. You can then use your address and check on a BTC explorer and a BCH explorer.
JV
As this Casascius 1BTC coin is fully loaded, does this mean it holds1 Bitcoin BTC, PLUS 1 Bitcoin Cash BCC?
What is the precise methodology to check that the balances are there in full?
What is the precise methodology to check that the balances are there in full?
Yes, it means it holds 1 BTC and 1 BCH. To check the balance, you will punch in the first bits you see in the middle of the hologram on here: https://casascius.uberbills.com/ or search it on the signed list provided on casascius.com. You can then use your address and check on a BTC explorer and a BCH explorer.