Topps 2020 On-Demand set #4, called MLB Black & White Baseball, has been showing up on collectors doorsteps. As the name suggest, this online exclusive set features the top players in the game, both past and present, on cards using unique black & white photographs -- many of which I have never seen before. Go here for a complete checklist. A total of 2015 30-card packs were sold.
The best card is clearly the Duke Snider / Jackie Robinson Historic Duos insert card. It uses a photograph I have never seen before -- featuring both players crouching with bats at their shoulders and they are nicely framed by a couple of other bats.