Those look like "Paul Bunyans" to me. They were packaged as such by Ravenswood Novelty, apparently to provide marbles for the wooden "Paul's Blue Ox" toy. People hemmed and hawed about who made them for years. In the end, Ron was pretty convinced that they were actually made by a Ravenswood employee at the Trenle Blake Pottery company very near to the Ravenswood Novelty site. He told me so the very last time we saw one another at the Pride of the Prairie Marble Show earlier this year.