Out of curiosity, and I'm not sure why I didn't do this earlier, I had AI do a scan of the pipe and gave it the pipe's 74g weight. It was asked to match this pipe with any known Peterson pipe model of that of any other source. It considered the weight, orifice button, detailed images of the stamping. I asked it to scour the internet for images of Peterson models, Astley's stamping from different eras, Azrati's known pipes (with the known controversies and dishonest stamping), as well as the "Silver" script stamped ferrule. The conclusions it made with arguments of proof for those conclusions were quite interesting. I do love a good mystery!