So I managed to glom another 1968 3D card in the latest REA extravaganza and it's got two characteristics that intrigue me, although since I collect 60's and 70's Mets cards, it's really three characteristics. I'll leave it at the first two for this post though for you non-Mets fans.
Here is one of the heroes of Game 4 of the 1969 World Series, pre-Miracle:
We will come back to the front momentarily. The back is reason No. 1 I wanted this specific card.
We've seen those stamps here previously and they also come in black. The auction in question featured one back with a black stamp (Fairly "No Dugout" variation) and a whopping eleven with the red version, including the "Dugout" version of Fairly. The Clemente was lacking the stamp, otherwise there would have been a complete set of reds, which is the most I have ever seen in one place.
By the way, a master set, per Keith Olbermann, includes five variations (Fairly, Maloney, Flood, Powell and Staub), all of which can come with either a red or black stamp to boot, although only blank backs would have been included in the Topps test packs.
Take a look at that lower left corner of the card front. You can clearly see two "pull" marks:
Those are similar to those found on my Maloney "No Dugout" card:
The two marks on Maloney are spaced farther apart so I don't think they represent damage from a "grabber" used after the cards were cut apart.
They likely do however, represent a problem related to the cutting process, where portions of the ribbed lenticular coating used to create the 3D effect would pull away from the surface during production. I suspect problems like this (and expense) contributed to the demise of this set, rather than just a poor test response. Just look at the long run of Kellogg's 3D cards from 1970-83 and aftermarket interest in this set to gauge what the interest level could have been.