Just finished an interesting phone conversation with Robert Mouat at Cornell Publications. He said that they looked at the original scan of the 1941 catalog for which they subsituted the page from the 1947 catalog because the illustrations were the same. They missed the fact that the write-up was different. He says that the page from the 1941 catalog has "-for 71 years" in the write up (1870 + 71 + 1941)and the illustrations include one of a Model 90 ST! He is sending me a copy of their originally scanned page from the 1941 catalog.
He said that they used a photocopy of the 1941 catalog they got from a extremely reliable source who was "very meticulous" in his documemntation. Based on Cornell's previous history with that source, he thinks the "original" photocopy of the 1941 catalog is authentic.
Robert indicated that the Model 90 ST is "perplexing" because it apparently also shows up in the 1952 Marlin Catalog as well. He commented that Cornell wants to get things right and not be a purveyor of incorrect information.