I recently purchased a glass slide of the League Champions photo for the 1889 Ny Giants. I've seen a little discussion on here about some of these slides for individual player photos, but after a lot of Internet research I could not find anything online about this specific slide. I'm trying to figure out when it was produced and in what volume (are there many of these or was this pretty rare). Any info would be greatly appreciated. See the link below for the photos.
https://www.liveauctioneers.com/item...-lantern-slide
Gary