Hi, this is my first post here, many thanks to David for introducing me to this forum. I bought a Heuer Monaco CS2110 few months ago from ebay Australia. The seller is reputable but there is no box/papers, and he is not the first owner of the watch. I have been enjoying wearing the watch (rotate with TH GC cal 17 & TH F1 chrono), for its distinguished square case and clean dial look. Although i have to admit i prefer the more iconic blue dial CW2113 i used to have. My joy turns to doubt when i opened the case and showed it to my friend. He's quite certain the movement is not 100% genuine. His argument is plates in TAG Heuer movement usually uses steel in silver color with stripes pattern and fish-scales pattern. While mine is gold color with stripes pattern and plain silver steel. He admitted there are some similarities in the movement so his next guess is that the movement has been modified and some original parts were replaced. I agree that it looks different from other TAG's movement i used to know, but for me it doesn't always mean it's not genuine. My only assumption is that it's produced in 90s so maybe back then TAG Heuer had different design. I have compared the outer parts (case, dials, back case, buckle etc) with pictures from the internet including from www.calibre11.com and i'm confident that they are the same as the original except for the leather band which is a replacement. Unfortunately from google i cannot find pictures of the movement for the same type of watch to confirm my (hopefully not his) opinion. As there was an article in www.calibre11.com on this watch few years ago, i do hope David has pictures of the movement to compare with mine, and will be more than happy to read his opinion and rationales on this matter. Will appreciate comments from other forum members as well, of course. Thanks.