Hello,
I have a wallet that I have not opened since Jun 2016, public address is 1Naj3FBzyi5AVMkt8BXTLi8imaDqcWUK4C.
When I located that address on blockchain.org & blockexplorer.com, it displayed for me a balance of 0.3787 BTC. To test that the wallet still "worked", I had a friend transfer me 0 ...