The gun is "Holland "patern ,dont see how you get Purdey ejectors .No Purdey style trippers and it has a extractor cam which Purdey's do not have.
I believe you are exactly right. But, the catalog copy mentions Purdey and Hollands. My read on it was Purdey locks, another read Purdey ejection.
Sometimes old catalogs don't give the best information, and we are reading from what is a second language to us. My Spanish is the South American variety, which differs from mainland Spanish in ways I don't even fully grasp, as of today.
Sorry.
Best,
Ted