Bird shooting with M/L doubles is lots of fun, if you have the right mindset. I have shot both wild quail and doves with my 16 ga. Doves are easier, as you can set up on a stand and use a loading rod with a big palm handle. Quail are a bit tougher as you have to use the ramrod under the barrels, carry the powder and wads and shot, and squat real quick to look under the smoke when you shoot so you can mark where the bird falls.
Those are very pretty locks on your gun. My Manton has very similar B/A locks.
I remember when you could buy a cased Boss M/L double at the NMLRA National Matches in Indiana for $2500, in pristine condition. But, that was way more money in '83-'84 than it is now.
SRH