It is a Rolex Datejust. Today, based on your preference for metals, size and fit, this one does it all. Formal when needed. Reliable and accurate. Good water and shock resistance. Moderate maintenance requirements (cost and frequency). Proven value over time. Though not a Datejust, my ca. 1968 Air-K
For me, the P210's only equal is the H&K P7 series. Both are at the top of the pile. However, they are totally different and equally effective at the same time. I am a P7 Man. "In a world of compromise, some men don't."
I was given this book from an Estate. It seems to have a personal note on the inside (last shot) I am not sure of the language. I looked up the ISBN and that was not helpful. Thanks. All the best... HEO