-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi
-----BEGIN SIGNATURE-----
15S7pv4u3taANyNbXYExkQPmbMu5HFm5ME
GzTkRiAPlHLU9HKPvcxMhEJmAmkGVWIb2dl2Oy3ZjnWDgVATd53+7iBVVHtkEhaZbMlGzJEtPTf3uYzi+vp6vUE=
-----END BITCOIN SIGNED MESSAGE-----

-----BEGIN BITCOIN SIGNED MESSAGE-----
Test
-----BEGIN SIGNATURE-----
1JQxSFaRUDRS6wp2yTsw59SEWyuy2UcebW
IJo9CWIrga8vuE8rd+l55syuycBvN8oyO8dx1GNOm0yVuaH8aUcnEQYz3fOabH9OHKzXi9xyFZQE55vho0W/x6A=
-----END BITCOIN SIGNED MESSAGE-----


One from Tomatocage escrow and one from a 2013 BTC addy used on this forum for a raffle/giveaway.