Below is a picture of an early NIB 66 no dash showing the stainless sights sights and the correct Goncalo Alves "Football" Target stocks.
It's an easy swap to change Target stocks to Magnas. I've never seen a 66 no-dash that was delivered with Magna's on a 4 inch but special orders could have been made.
The early 66s had stainless sights. Many later no dashes had red ramp front sights and black rear sights due to PD's not liking the light sight picture. Many early police guns with stainless sights were either modified by S&W or local gunsmiths. Your later serial number may indicate it was delivered with the R/R and black rear sight.
They were shipped in the blue boxes. It would have included a tool kit consisting of a screw driver, cotton swab, rod and wire brush.
I didn't have a handy 66 box picture available. This box is for a 67 but they look the same. Some early 66s had an integrated label like this picture rather than the stick-on label of later guns.