Kong[Moderator]
7855
Answers to your questions : ...
1) MM GMT ( Ref :15/8992) has the bracelet option.
2) Case diameter is 44.00-42.50= 1.50 mm different...might not be so easily detectable.
3) If including crown, the XL would be 49mm. So you are right!
For more details, please click here to be the previous thread which has some info.
Attached the picture here for your quick reference too.

Kong
MM Gran Turismo XL
By: steverawley : January 30th, 2008-14:18
Is there a Stainless Steel bracelet from Chopard that fits the MM GT-XL? I have seen the bracelet for the GMT but the case size is different. I can't get any info from the Chopard dealer--they don't even know! Any info would be appreciated. This is a bran...
As of now...
By: Kong : January 31st, 2008-00:06
there isn't any bracelet for the GTXL yet.... however Chopard also did not advise if any on the drawing board. Let's hope there are some good news soon...as the people in tropics prefer bracelets! Kong