Hi all! I'm a contract archaeologist mostly working aboard NAWS China Lake, in Inyo County, CA. I have a probable branding site that I'm pretty sure I can tie to a local Panamint speaker (Timbisha Shoshone) of local note whose family grazed horses in the area between roughly 1850 and 1960. The site's archaeology broadly points to a late 19th-early 20th century timeframe, but its assemblage incorporates an "Indian Chief" anvil that I'd like to pinpoint a manufacturing date on, but I can't well match its serial numbers to those listed in AIA. According to my recording crew, it's stamped "T4 9A5S1331". I'm guessing the 1331 indicates a manufacture date of 1898, but I'm clueless as to the other numbers and letters. Any thoughts? Unfortunately, I don't have the pictures they took, as the Navy hasn't yet approved them.