If it was part of a font, then I would think that the logo was in vector form. (It could have been a bitmap font, of course, but if you're sending the font to magazines and publishers, a postscript or TueType font would have been more appropriate.) If it did exist in the font as a vector based image, it seems strange to upload a rasterized version to archive.org. It wouldn't have been too hard to upload it as an svg or eps and maintain its quality regardless of its size/resolution.