Hi Ted, I have been collecting and observing Ritchey cards for about 5 years now, and have come to the conclusion that 99% of the 150 cards show no dove in the clouds, and the few that do look more like faint clouds than a dove. The 350's on the other hand, contain the extra blue and the extra clouds and "dove" 99% of the time. I believe this change was made by design and may help with the timeline of product distribution. To date all of the Ritchey's with EPDG back look the same as the 150 cards: While all of the Old Mill's look like 350 cards: Except Piedmont I'll try to post a few more scans and some raw data on the number of cards sometime after dinner. Heading to a meeting Brian