Seamaster Chronograph 176.007
The 176.007 is one of my favorite chronographs. It houses the cal. 1040 movement based on the 1341 Lemania movement. One of the interesting features of this watch is the subdial at the 9 position. This is a cocentric dial with a continuous seconds hand and a smaller internal hand/disk serving as at AM/PM indicator. This specific example is likely from early production period, which spanned from 1972-75. It has the ref 1170 bracelet with 653 endlinks.