Indeed I can!
Address: 1JVfo7NhM18JA5khT5r5q5gFy1sqrFZ89z
Message: It's a me! bmoconno = bmoconnotoo
Signed Message: H8xnYhEGToABPVg6MuHkRW2QtLZ8cgJPjcH9NPDzez9eA8/3H8jef1pcDPv1zFj3d5m3k2X2Ceaj5IUYgKchLew=
I think that 14W74.. was from a web wallet or something when I was young and stupid(er).
Here is another signed message from the address in my sig as bmoconno:
Address: 13SZex4uANVrfTeeuFEXGu6W8EVYtWVB53
Message: It's still me! bmoconno = bmoconnotoo
Signed Message: H2AcC/6r09NztWoFzdPZ+JCh4u6iBSatV1UmY80FMeMtLeUvrZmvM+J7a87wgfJx8GdRQ9cAon7n4uCvoBN8lQM=
Thanks for the suggestion, LoyceV
Edit: I just got a response from my email to the reactivation address asking for a similarly signed message!