Raimey, I am not familiar with what the Perke's patent ejector should look like. Maybe Terry can look at his gun or take a photo of the mechanism. It would "fit" better into my understanding of Pittsburgh marked guns if the ejector was an early one like Perke's. I have not seen ejectors offered in Pittsburgh ads, but they were expensive guns and I'm sure Westley Richards was offering ejectors on their gun ca. 1882, and probably earlier, so ejectors could be had.