3/2/14 17:58 Generated but not accepted. Mined (no label) 1CxzzbwacQNEri2VmLnBByiruLWeUKLzcr 1250.00000000
Open it with a different wallet,Show different addresses.
sometime in march 2014 with 1250 coins PoW rewards... possibly HTMLCoin?
suffered a 51% attack in June 2017 and initated coin swap in November 2017 though I'm not quite sure because HTMLCoin address starts with H...
and since it's already swapped, any txid in your wallet can't be searched on current HTMLCoin block explorer
but try search the web or any explorers using any confirmed txid you have in your wallet, you might get a hit