Sorry to have to tell you, the reason there is no match-up for it in the Albert button-book is that it is not an actual US Navy button. It is a crude imitation made for use on civilian coats and jackets. Unlike on actual US Navy buttons, note that the rope which encircles the emblem does not pass through the ring on the anchor's top.
For other readers who may not already know the terminology:
Mike From MI is correct that his button has what is called a "self-shank" back... meaning, a raised part of the back itself acts as the shank for sewing the button onto cloth. See the photos below for the specific variety of self-shank back on Mike's imitation-Navy button, in non-excavated condition. Some self-shank backs are tinplated iron, and some are brass. This variety of self-shank back was invented and patented in the early-1900s. No actual US Military buttons have a self-shank back.
