For comparison, here are Joseph Loy's dogs. Note the blocky, upturned snout. It is the most telling feature of Loy's animals. He didn't ALWAYS do his setters this way, but as I've seen them, the pointers have always had this snout. The second picture shows his signature on this Remington 1894 EE grade.
Note that Spangler's work above is generally soft, almost dream-like. In contrast, Loy's style is bold and deep set.
- NDG