Revolver
Model numbers 117 vs 207 and external physical features
1968 - 1988.
In stainless, and in New in Box (NIB) a Ruger Speed-Six in 9x19 is worth $1,000+ as of 2010. In stainless, and in like-new condition, a Ruger Speed-Six in 9x19 is worth $700+ as of 2010. The 9x19 version of the Speed-Six is quite rare in the U.S. since only a few were sold in the US from European and Israeli military/security contract overruns.
Yes
The Ruger web site has sn data if you can get to it.
75-260 or so
50-500 USD depending on specifics
Ruger added a warning label to their Speed-Six revolvers in 1989. This label was intended to inform users about the potential dangers of using the firearm, particularly regarding the use of certain types of ammunition. The warning was part of Ruger's broader commitment to safety and responsible firearm ownership.
100-300 USD
100-400 USD
Ruger's website has extensive sn data available for all. 150 USD or so
100-300 USD