It’s for a 1675/0 model from mid 60’s to late 70’s early 80’s.
It's not that simple unfortunately. Definitely 1675 though but not 16750. You could ask buenosdias or springer on the rolexforum if you really want to know which years this is correct for.
Not going to mince words here, that insert will fit those models. I’ll leave it to the geeks to duke out the meaningless obscurities that bring zero value to the table. Sorry, but been there done that with the aforementioned ‘experts’.