Sinn Watches - 903 St– the Navigation Chronograph. Worn with solid bracelet on a 7.3" wrist, the 903 St with 41 mm case measures 48.2 mm from lug to lug (12-6 o'clock).
Sinn Watches - 903 St B E – the Navigation Chronograph with dark blue dial. Worn with brown horsehide strap (contrasting seam white) on a 7.3" wrist, the 903 St B E
![Navigation Chronograph 903 Watches - Sinn - Instrument Chronograph - Navigation Chronograph 903 - James Moore Jewellers Kenilworth Navigation Chronograph 903 Watches - Sinn - Instrument Chronograph - Navigation Chronograph 903 - James Moore Jewellers Kenilworth](https://cdn.jamesmoorejewellers.co.uk/wp-content/uploads/2018/07/12052332/product42169-0-5362_cropped.jpg.thumb_975x1600-645x1058.jpg)