You just reminded me to finally measure the lug-to-lug distance for the 3 Lange 1 sizes.
Little Lange 1=44mm lug-to-lug, 36mm diameter Classic Lange 1=47mm lug-to-lug, 38.5mm diameter Grand Lange 1=49mm lug-to-lug, 41mm diameter I love the 38.5mm size, though the Little Lange 1 fits my small wrist better. ...