yes, almost all are on record just post the #s and I will try to give you an answer
You will need to supply the serial numbers to your shotguns to get the age of your browning shotguns correctly.
NO
A 1972 Honda SL350K2 in excellent condition could be worth $3658. In good condition $1475. In fair condition $670. It's all about condition. These numbers come from NADA Guides.
between 2000.00 and 4500.00 but you should check with kelly blue book numbers
Most do, some don't.
Not until required by law in 1969.
100-1000 USD or so
Blue Book of Gun Values
Serial numbers were not required on shotguns or rifles by the Federal governmant until 1968. Any company that did so before that was marking them voluntarily. Mossberg for example specifically stated that they didn't use serial numbers on their early rifles to pass the savings on to the consumer and keep the cost of production down.
Try Browning.com
No published sn data.
Browning.com has sn data under customer service.