Here is my Aquatimer with a custom made leather ZULU strap on. I have both the original rubber strap and the metal bracelet, and the watch certainly looks its best in them. However, the reason I have this leather ZULU strap on, is because my wrist profile is rather flat, and a NATO/ZULU strap seems to fit my wrist better. Although, the original rubber strap is soft and pliable, the rounded shape of the strap when fasten makes the watch rolls around my flat wrist quite a bit. The bracelet fits a bit better, but it makes the entire watch quite heavy (over 200 grams) for an all-day wear.
The regular nylon NATO strap is too slippery for this rather heavy case, hence this leather ZULU strap answers all my needs. One thing to keep in mind when switching to a NATO/ZULU strap though is that, it exposes the area between the lugs, which makes the watch look somewhat unrefined compared to the rest of the case. You could say that it ruins the elegant look of this well finished watch, but it does give the watch a tougher, more military look. Whether this is a good thing, it's a matter of taste.






PS: If I may say, the custom made strap was ordered from yellowdogwatchstraps.com