No, the 66-2, introduced in 1982, eliminated the barrel pin and the recessed chambers. Also, the cylinder was lengthened a tiny bit. I see neither a pinned barrel nor a cylinder with recessed chambers in the pics posted.
As for trading value, if it is mechanically sound, no excessive wear, has not had its factory finish altered, and comes with its original box, papers, and tools, these days, I'd say it would be around $900. No box, papers, tools, then it drops to the $700 to $800 area. That's my opinion, not based on some of the insane online auction bids, but taking into consideration desirability and current market forces and resultant prices. Also consider that S&W is not making these old revolvers anymore, how badly do you want what is now considered to be a classic S&W 357 Magnum revolver?