The recorder shall keep an official seal of his office which shall, when embossed, stamped, impressed or affixed to a certification, show legibly.
Such seal shall:
(a) Be circular in shape;
(b) Be not less than 114 inches and not more than two inches in diameter;
(c) Have in the center any words or design adopted by the recorder;
(d) Have inscribed around the central words or design, “Recorder, ____ County, California,” inserting therein the name of the county.
Nothing contained herein shall prohibit a recorder from continuing to use a seal of a design different than that specified herein if such seal has customarily been used.