No serial number = no age. 50-500 USD value range.
@1984
1978-1979
c.1980. Value around $350.
@ 1985
$200.-275.
The Smith and Wesson model 29 is a caliber .44 magnum revolver. Smith and Wesson has many models in caliber .357 magnum. The closest numbers to the above number would be models 27 and 28. The correct model, the condition and the age are necessary to judge value.
1980. Range from 100-400 USD.
47
@ 32 years old; 50-750 USD
Ruger's website has extensive sn data you can access.
1974. Value depends on condition, accessories, etc.. Range 250-500
depending on overall condition price could be $250 -$350