I'm being pitched what is purportedly a Seamaster Yachting chronograph ref. no. 176.010 but I have my doubts about its originality. For one thing, when I pull the crown out and adjust the date there's resistance as though I'm winding the watch, and it even sounds like it's winding, making the ratcheting clicks. My 176.012 Speedy Mark 4.5 doesn't do this although that has a 1045 movement. Also, if the chrono is running and I pull the crown out to adjust the time (probably shouldn't do that) the central chrono minutes hand follows the regular time minutes hand around the dial. So if the chrono hand was, say, 15 minutes behind the minutes hand, it will follow the minutes hand as I adjust the time, always staying 15 minutes behind it. Again, my Speedy doesn't do this. On my Speedy, the chrono minutes hand stays put when the regular time minutes hand is adjusted. Can anyone say if either of these last 2 observations are normal for the 1040 movement? I appreciate your incite.