The first 617 six shot with forged hammer trigger is a stainless version of the blued 17-6 .
They are in short supply and high demand ,
If you want an early 617, 17-5 or 17-6 and know where one is for $700 or less ....
IMHO either aquire it immediately or regret not buying it.
Newer revisions are also 4" 22lr revolovers but have different barrels, cylinders, hammers/ triggers, frames and are IL guns ,
More plentiful = less desirable to the purist collector.
Three years ago a 4" 617 no dash could be found easily on GB for $500,
Today any no dash 617 at that price is either a beater or the owner simply does not know what he has.
SS 617 no dash (left) blued 17-6 (right)