Steve -
The Marquard card in question is very similar to the color combinations of Ritchey. The "Dove" in the sky that shows on some Ritchey's but not on others is the result of an improvement in the application or quality of ink in the 350 series printing. A person with more understanding of the printing process could possibly speak to the exact cause of the difference.
Both cards image quality improved during the 350 series.
I don't think this is the cause of the white lines on the Marquard though.
