Postcard, labeled Cocker Spaniel. A Guy Withers Study 10.
Interestingly enough, this looks more like a modern English Springer Spaniel than a Cocker. However, this makes sense since the breeds only split in 1902. Also of note, this is likely an English Cocker Spaniel as the American Cocker Spaniel was recognized as a separate breed (by the AKC) in 1946. Or, perhaps more accurately, it's just the predecessor of both the English and American varieties. But as this postcard was printed in England, it can be called an English Cocker.
On the back: Painted and published by photo-precision ltd., St. Albans. English Series Postcard. This is a Genuine Photograph.
Condition: Actual image pictured. See picture for condition. Overall good, small penciling on back.