$100
Most firearms have the model number/name stamped on the receiver or barrel of the firearm in question.
Don't post your firearm's serial number!
Gunbroker.com will have similar models in similar condition to which you can compare your firearm.
Remington has never made a firearm with the model designation of 812
Go to Browning.com, select customer service, then select date your firearm.
Please state the Winchester model number,serial number,and the caliber or gauge of your firearm so that you could receive a answer to your question.
I find no reference to a Model 90. Please list the information exactly as written on the firearm.
The exact value of a Davidson firearms 16 gauge double barrel model 63 is actually dependent upon a number of factors. Some of these factors would be the condition and age of the firearm.
ROUGHLY $85-$115.
$10 if broken, rusted or worn out. $60-$90 if a useable firearm. $100-$125 in showroom condition.
Go to Browning's website under Support then go to Date your firearm. Value of any used firearm depends upon condition and area of sale.
$100-$175, depending on condition