Here's a DH(E) serial 149011 in my care that has non-factory ejectors. These work the opposit of Parker. The trip pins extend out from the joint face when the hammers are down. Parker pins snap in when the hammers are down.

Odd thing about this gun is that the Serialization book shows it as having factory ejectors. This is a two barrel set, so possibly the code was entered wrong. I haven't ordered a letter on this gun yet (although I've had it for over thirty years) but I do have the hang tags.

David does your forend iron have a pin going through the curve? How are the actual ejector blades held in place? Is there a stop screw in the middle of the barrel lugs like an extractor gun has? It doesnt look there is a typical stop plate on the dolls head but somebody went to the trouble of slotting it for Parker style ejector blades. Makes me think whoever fit the ejectors used factory ejector blades rather then making their own. I cant really tell from the photos but it reminds me of Charles King's patent.

I really love extractors....!

DoubleO, you are correct, there is no stop plate in the dolls head. It does use the standard screw between the lugs to secure and stop the ejector blades.
I will try to get some pictures of the ejector mechanism in the forend iron tonight.
Here is a shot of the barrel flats for each set. Notice that one is stamped with a "5" and the other a "7" where the grade marking usually resides.

The Grade-7 barrels were likely fit to the gun after original production. An extra set of barrels when new would have been marked with the same grade as the gun and barrel set #1. Sometimes a lower grade set would have been used for the second set but it is highly unlikely that barrels intended for a higher grade would have been applied to the gun.

Edit: Dean, thanks for your reply. You posted it while I was typing this one.

Well....upon closer inspection of the forend irons and ejector mechanism, I've found remnants of another serial number. 85314 . This number is stamped plainly on the underside of the forend latches and partially visible on the irons.
There is the remnant of that number on the lug of one barrel, partially obscured by the current serial number 149011, and the last three digits 314 is found on the rear lug along with the last three of 011, on both barrel sets.
According to the Serialization book, 85314 was indeed a grade 7 gun, but had Whitworth steel barrels, yet both sets of barrels have Titanic Steel marked ribs.
Both barrel sets mate perfectly to this receiver and I have hang tags for both sets that I fully believe are authentic Parker tags.

So now I have a new question. Did Parker recycle barrels? If not, where are the original barrels and who would have used grade 5 and 7 barrels on a grade 3 gun?
I've taken photos and will post them shortly.

Yes, there is a great deal of evidence that Parker Bros. recycled barrels as well as other parts.
Whitworth barrels would have had the Whitworth stamp, a bundled wheat sheave, stamped on the underside of each barrel in the area of the very forward edge of the barrel flats. Whitworth also stamped their consecutive serial numbers on the barrel flats, again at the forward section of the flats.... Is there any evidence remaining of these stamps?

There is no evidence of the Whitworth stamp or tube numbers.
The forend latches are definitely higher grade than D considering the engraving. I wonder what happened to AAH 85314.
I guess this is a mystery that will never be solved.

Here are some pics of the various pieces and the ejector mechanism.

That is the most well-documented use, by the factory, of orphaned Parker parts I have ever seen. Would really like to know the complete history of both of these guns. Just amazing!!