Vintage Missoni for Saks 5th Avenue drop waist striped dress silver cream orange

This has a couple of spots as shown and could use a dry cleaning but is otherwise in very good vintage condition. Orange, cream, and silver stripes, very 70s vibe. Drop wasted sparkly party dress, matching belt included. Size is not included on the tag but I would guess about a modern 8 or 10. Worn by my fabulously stylish grandmother. I can provide measurements if needed, feel free to comment with any questions.