Jamie-
I think a major point you and I differ on right now is that you believe there two be two cards. One with Dove and one without.
I think they all would have Doves had they been printed with the same quality. It's the poor quality that keeps the Dove from showing. Not the absence of a Dove on the stone.
Does that make sense?
Ted-
Your Sweet Caporal is beginning to show the Dove though it is very faint. Notice the little bits of dark blue around Ritchey's bat and head and a little patch just off center in the top.
Also look at how the dark green runs slightly higher on that card compared to the other three.
This is the main point that I have been trying to make. The dark clouds that produce the Dove are proportional with the dark green on the bottom of the cards. The higher the dark green ink carries up the card, the more dark blue in the sky.
I know nothing of the printing process but it seems as though the ink was applied from the bottom to the top and wasn't sufficient on the earlier cards. It ran out early thus not printing the entire image of the clouds. Once corrected through whatever change the entire image printed more consistently.
Look at the difference in how high the dark green carries on these examples in relation to how dark the clouds are.
After looking at a lot of Ritchey's I have never seen one with dark green far up the bottom with no Dove. And I have never seen a Dove with the dark green lower on the card. But it is T206 and it could be out there.