I'm looking for input on a leather strap for my 556. I'm really into 3-ring ZULUs as I love the utility and added security. That being said, I've noticed the distance between the springbars and case on the 556 is narrower than other watches I've owned and finding a leather ZULU or G10/NATO that isn't too thick has been a challenge.

A few requirements:

1. Must be a ZULU as NATOs are too thick and add at least 2mm to overall height of watch.
2. Must have smaller keepers
3. Leather must be "thin" enough to fit between watch case and springbars