Antique Benjamin Franklin air rifle

[Selmer]

I have inherited a .22 caliber Benjamin air rifle from my great-grandmother who used it for clearing sparrows out of her yard.  It has the look of a Benjamin/Sheridan air rifle, but with a corncob forend.  It have a compression chamber the full length of the barrel, and it works magnificently, I still get 700+ fps with ten pumps on the forend.  It appears to be made entirely of brass, including the barrel.  The wood is about 75%, the blueing work about 75%.  First of all, how much is this gun worth for insurance purposes, and does anyone have one of these rifles?  They appear to be good guns, I've killed some bunnies with it, but that about it, it shoots clover-leafs at 20 yds.
Selmer

[dave]

Sounds like either a Benjamin 312 or 342, made by the Benjamin Air Rifle Co in St  Louis. Its made of phosphor bronze.  The model number should be on the rear tube cap. Realistically its worth maybe $100 or so. They are pretty common guns, and are very well made. Take a look at Auction Arms or Gunbroker.com, theres always one or two up for grabs.

[Selmer]

It's the 312, thanks for the unseen appraisal.  I love shooting the gun, although it'd be nice if it didn't have to be pumped so much .  I'm having shoulder surgery this coming winter after hunting seasons, it makes pumping it a little interesting, but it will be my baby girl's first gun in a few years, she three and a half weeks old right now, but she's already been fishing with me once.
Selmer