My 103 spends most of its time on an H-link bracelet, but occasionally, I get that funny urge to break out the springbar tool. Lately I've been enjoying this dark brown cowhide strap from Sinn. Although it took a little convincing, I've also grown to love the original black strap with white stitching that the watch shipped with.
Let's see your 103 on the hide of your choice! All variants of the 103 series welcome: acrylic, sapphire, old, new, special editions, whatever you've got. Exotic materials especially welcome!