>>18585813
>the Richard Lange L2L is 49.5
I just checked for my favorite Richard Lange (the salmon dial jumping seconds) which is also 40mm (39.9), and the L2L is 46mm.
Two independent sources:
https://www.watchadvice.com.au/55742/review-a-lange-amp-sohnes-beautiful-richard-lange-jumping-seconds-alangesohne2025
https://monochrome-watches.com/a-lange-sohne-richard-lange-jumping-seconds-with-salmon-dial-white-gold-review

On the Lange website the "regular" RL seems to have pretty much the same proportions (accounting for some photographic inconsistencies, see pic)