"Why does he say he is 52+?"
He says he has been married for 52+ years - not that he is 52 years old. It doesn't appear that Mr. Esseff has obscured anything. A little research shows the following, all of which is consistent with his ad:
GEORGE J ESSEFF SR YEAR OF BIRTH: 1929 1965-84 active as president of Cosmos Minerals Corp, sold shares successfully. 1975-present active with affiliate. 1975-present active here (i.e., owner of Stellar Resources Inc).
You misread part of it. He says he has been married 52 plus years. Not stating it as his age.
He is probably in his 70s minimum.