The Style X does not appear in either catalog. The letter is skipped over. The logo on the tang is an old style. Apparently the Style X was discontinued by 1907. This has an X 46 stamped on the tang. It is a 6/8" Medium Thin Concave blade. This item passed through eBay in April 2011. Other pink ones passed through eBay in August 2008, July 2011, and August 2011.