This is a brand new unused Grand Seiko produced in 1968/69 by Daini Seikosha Co., Ltd. It was loaded with the best quality hand winding Movement - 25jewels, hi-beat 36,000bph 4520 A. 4520A was initially Grand Seiko Observatory Chronometer and has GS standard official approval. Some of the 4520A has Astronomical Observatory Chronometer official approval. How I wish this one has...... Astronomical 4520A is a Legend and will cost around ??????? This is my first ever Grand Seiko! All original except the leather strap... but the buckle, crown all signed GS. It even comes in original GS Paulownia wood box.