Is this 1967 Browning Superposed a good dove gun?
 

$1,100 seems a modest price for a genuine Browning Superposed over/under in pretty-good shape. These in minty original shape typically are priced like some new compact automobiles. This particular gun has 26" barrels and fixed modified/improved cyclinder chokes. Made long before the days of choke tubes. Modest but decent engraving. Blued receiver. Looks like a respectable field gun. I generally think of 28" in an open field. The shorter barrels may make this gun swing faster on speedy doves? Maybe? I generally think of skeet and improved cylinder as "dove chokes". I might hunt near a water hole or an open field over MOJOs. Dove/field loads, being light in recoil, should pamper the action of an old classic like this well and be easy on a firing shoulder. 12 gauge is certainly the bore for quick and fickle-moving dove.

Browning O/U's of that era are considered one of the standards by which O/U's are judged. My cousin has one that he purchased from a retired friend that he uses for grouse hunting. He is deadly with it. I've seen him double on grouse many times. If it fits you, I say go for it. You'd pay a lot more than that for an equivalent quality shotgun. It's one of those guns that, if you pass on it, you'd regret it.