I know this and i am very carefull with my straps. The strap is like the shoes, "Show me your shoes and i tell you who you are".
I can not understand when the people wears straps with a microcosmos inside and i always feel with the watchmakers, when they have to touch this worn straps..
The strap is for my 16758, but the strap which is on the watch now, gets a wonderfull patina and everytime i wear it gets nicer . So i dont want to change it in the moment.
Be sure, i am crazy enough to spend for a strap of horse leather the same money, like for a whole living horse (not the best horse).