A. Lange & Söhne

I recently added this to my WG ALS - so much better vs the buckle and the regular deployment. If you can find it my recommendation is to grab it! This has a twin trigger release and balances the weight much better. ...  

(Assuming it is the deployant that separates)

I tried the trigger version and found it too big and cumbersome 👍 Congratulations on yours though, sounds like you are finding it perfect.

Balance on and off the wrist is important to me - I feel it works great. But each to their own

It's a great deployant clasp for the larger, heavier Lange watches. Unless I'm mistaken, the quick-release deployant is available only in 18mm, not 16mm.

... and then used for other models such as the Terraluna.