The L1 mp first generation was already a superb watch, but this second generation with its "lively" day/night indicator and the balance wheel next to the crown (☝️) is magnificent evolution.
Came with a black alligator strap, I swapped it for this purple one with titanium stitching...it's a Jean Rousseau and I selected it at the Lange Boutique in NYC. I believe JR is the Lange OEM strap supplier and they had a wide variety of JR strap materia...
Pairs super well with your Lange here, the purple is perfectly complimentary to the black aesthetics. JR knows what they're doing. Is that platinum threading, by the way?
I went in thinking I would get a blue strap to match the day/night indicator but ended up really liking the purple...exactly as you said, it pairs well with the black and WG look. It's titanium stitching.