I'll give that some study.
Not having samples to compare is a real hindrance. The pins could be smith made replacements and not correct dimensions. The one I removed is not in the kind of condition you'd expect in this quality firearm. The other is a little stubborn and I'm letting some oil soak in before trying again.
Another wrinkle, the barrels are not original on this gun. The reliever, locks, trigger guard match but barrels are another and the forend iron yet another.
The receiver is made for doll's head but the barrels do not have a doll's head.