If you have the box, post the product code. S&W has made non-standard barrel lengths at various times for various distributors.
Yes
100-1000 USD
Yes.
3 or 4 inch
$750.00
the value of a smith Wesson 8 inch barrel model 27-2
100-500 USD
6500
It was a Smith & Wesson Model 29 with a 8 3/8 inch barrel.
Yes. sales@countrygunsmith.net
Your smith and Wesson model 686 is valued at 250-425 dollars depending on condition.
Model 37