But does the production 0000 frame .410 have the reinforcing screw? I don't have access to one.

Bill raises a good point. Parker made BTFEs did not have the reinforcing screw.

Only on the 000-frame .410's... all others had the reinf screw.

I'm still wondering whether the production 0000 frame .410s have a reinforcing screw like the prototype does.

Possibly you are correct but I have never seen a factory- not repro- 410 with a 00 frame in my experience.
Show me one so I can see.

I'm not referring to a 00 frame .410. 000 frame .410s don't have reinforcing screws. As I have asked several times, "Does the production 0000 frame .410 have the reinforcing screw?"

George, there are 00 frame Parker Brothers .410s. I have only seen two, but there are probably more. The Cliff Green BHE .410 is built on the 00 frame, and the K.C. Miller VHE .410 skeet is built on the 00 frame.

Bill- I am a long ways from my TPS. Was the Cliff Green BHE a combo 410/28 by any chance?

That's the one. And the K.C. Miller VHE skeet was owned and shot by the first person in NSSA skeet to run 100 straight in registered competition with a .410. Unfortunately, it is thought that K.C. was shooting an Iver Johnson Skeeter at the time.

This gun is at $15,250 and reserve has not been met. I am getting close to turning loose of my VHE .410 Skeet if the price gets much higher on this one.