Ok, so not as smooth of transaction as I hoped for. I removed the back to check the movement and it has a gen 645 but the rotor is removed to be a hand wind. I knew the watch was a hand wind but thought i was getting a 600 series. The 645 is more desirable of a movement but... Not what I thought I was getting. Both movements are correct for the watch. Here is my question, are there any issues leaving the 645 as a hand wind? I searched the web and don't think there is a problem but just want to check.