Yes. Website: Double Barreled Shotguns, High Grade Shotguns Dates of Production
You will need to supply the serial numbers to your shotguns to get the age of your browning shotguns correctly.
Unaware of any sn data published.
I know this a really simple answer but take it to a gun specialist.
Try Blue Book of Gun Values
The exact value of a Franchi Aristocrat shotgun is actually dependent upon a number of factors. Some of these factors would include the age and condition of the shotgun.
Bill Goforth has an excellent book on the H&R shotguns. You can do an internet search to find a copy.
The value of a Franchi Alcione titanium shotgun can vary depending on its condition, age, and any additional features. Typically, these shotguns can range from $1500 to $3000 or more for a well-maintained model with both 12 gauge and 20 gauge barrel sets. It's recommended to have the shotgun appraised by a professional to determine its exact value.
In order to determine the age of Lefever shotgun, the serial number must be known. However, Lefever shotguns were only made and distributed between 1885-1916.
There are a wide variety of online merchants on the internet in this day in age. One can find online merchants by just simply taking a look at the Online Merchants Directory.
One can find brain age tests online on the Flash Fabrica, Free Brain Age Games and Corante websites. Also the lumosity site has some games for mental sharpness.
18 for rifles and shotguns, 21 for handguns