I saw a S/el chronograph in white dial, the case back is S35.006M while this watch is listed as CG1120. Which is the actual model number, and what are the differences. On the dial only '200 METERS' is seen, there is no 'PROFESSIONAL'. The owner claims that this watch is an authentic Tag Heuer watch, I read 'PROFESSIONAL' must be also be present but saw other '200 METERS' only on the web. May I ask for some advice from the knowledgeable members here, if I am looking at a fake. Thank you.