Hi Jarl - you are correct, Montreal lug size is 20mm.
Have you ever held a Montreal before? The one thing that may surprise any Heuer enthusiast is just how large the Montreal case is. It feels chunky and solid on the wrist. I love mine, it never fails to impress me as i put it on. My father has a a barrel case Carrera which he bought new, from seeing it i had imagined the Montreal would be on a similar scale in terms of size. I was WRONG ! Although it carries the same basic shape, it is on a grander scale.
My guess is you're going to love your new watch. I firmly beleive the Montreal is the most under-rated watch in the Heuer range.
Enjoy it, please post some photo's - Darren

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: I have a white Montreal coming my way in the mail... :-) My first
: Montreal.
: I just got one question, what is the strap lug size? Is it 20mm?

: Best regards

: Jarl
: www.classicheuers.blogspot.com