Wonderful gun. Box and all. You are fortunate. I have the same gun, a Model 67, no dashes. Over 18,000 rounds through it. Basically retired, but I still use it for re-qualification for my CCW. It's the gun I shoot best.
My standard caveat: The lug holding the cylinder latch and the tiny screw securing the rear sight assembly to the top strap may loosen when shooting. Be attentive to this. Re-tightening them by hand every range session grows old fast. I had a gunsmith secure them. Other folks recommend some form of Loc-Tite. Nail polish will NOT work.
I have encountered this issue on other stainless Smiths of this era, including a 60 and 64. Also a later 640, the cylinder latch lug on these last 3. YMMV. Hope this helps!
Kaaskop49
Shield #5103