Joe,
I'm not surprised you chose the Jackie Robinson card as a scan choice for your thread. With so few non-Topps cards produced of Mr. Robinson, we have to search far and wide for nicer cards. The Sportscaster card is a honey. Maybe they were produced in the mid-70s, now close to 40 years ago, but the photo is so evocative and nostalgic of his career in Brooklyn. The earliest date on this shot would be 1952. That year the home uniforms had a significant change--uniform numbers on the front were now in red rather than blue.
The hobby maybe doesn't consider Sportscaster cards valuable, but as a Jackie Robinson fan the eye appeal of that pose with the Ebbets Field backdrop is PERFECT.
For what it's worth, I think you made a great choice for a Dodger collection. From what I can see of the Sandy Koufax, that looks to be a killer image as well!
Have a great day. ---Brian Powell