Correct Box

[Striker]

Just picked up a used Single Six 5.5 with the extra mag cylinder, no box. A check with Ruger determined it was made in 1980. What is the correct type/color of box this would have been sold in? Thanks

 

[SteveRuger]

It would be the Yellow one piece flap box! Fairly common to find.

 

[chet15]

it would also have an NR5 sticker on the end if it is a blue gun.
Chet15