This nice Motorola has the 21" conversion kit that Motorola offered. It included a new larger mask and additional mounting hardware. This color set was by no means the first offered to the public. That distinction goes to Admiral model C1617A (Dec. 1953) or the better documented Westinghouse model H-840CK15 (Feb. 1954). Both utilized 15GP22 picture tubes. CBS offered a color set in 1951, but that's another story.
