Repairing Daydate Permanent link pin

[tothemoon]

I received the DD as an heirloom from my grandfather so I can't say for sure if there are any aftermarket parts. It's a 18348 and I have brought it to a certified rolex watchmaker to service before, and they opened it up and operated on it without a problem, fwiw. (Also, note that the pad above my thumb in the original photo is just a felt sticker pad I applied on the caseback so it fits my wrist better -- previously too loose)

As for the pin itself, I searched TRF as you recommended. I was able to to discussions about the removal of permanent pins for oyster links and jubilee links, but not the presidential links. The oyster and jubilee links seem to use stainless steel pins that can be snugged in, but the presidential links use gold pins, and it's unclear how they're attached to side links. Please let me know if I missed a thread! TY!