New to me is a Parker , ser# 154,--- , which indicates to me that it was manufactured in 1910 ..it is a 12 gauge . I want to remove barrels to further identify this fine gun .
For some reason the barrels will not hinge off , like my other doubles ? The hinge or pivot pin is slotted - does this have to be removed , to remove barrels ?
I've got things soaking in some atf now , hoping this helps ..

I have another Parker Trojan grade and the barrels just unhinge once the forearm is off .

What's up ? Thanks , Bob

Got it apart ...

Now i hope you can get it back together! :-)