Again, working from memory here- the firing pins have no springs and if original should extend just a few thousands beyond the face of the standing breech. The extractor is shaped to push the pins back while opening/closing the action. Given the condition of the screw head in the pic up there it's doubtful the firing pins are original and may be too long. Does this appear to be the case?

Yes, I did write a book. It's called "The Classic English Double Barrel"