They did indeed have a gray red 12 over 12 combo. This clip is from 75. I've seen a couple of 12d top chests for sale, both in the 125-150 range but they get scooped up almost immediately. I've never seen a 12d gray/red bottom chest available but they are out there.
NYB: I hate appraising things, the market is has so many variables. That era is out of my specific interest but I did see a 12 over 12 set with with that logo on MarketPlace for 50 bucks. I think I saw it within 30 mins of it being posted and it was sold by the time I responded. That's an outlier, they're worth more than that. If I was trying to sell that I'd put 175 on it and see what happens. 1983 isn't really collector material for me but there's some younger guys out that think that's the stone age and are into it. Even 125 would be a great return on your investment.