You can read more about my intro into woodworking and my go-to advice when beginner woodworkers ask me "Where do I begin?" here: http://www.tmbridge.com/woodworking/
@gruman, thanks for the info! I think I found the same page you linked during my research and I largely based my estimate on the data on that page. I did look for a stamp in the brass on mine before I started the restore but couldn't find anything so either it was never there or wore off before I acquired the tool. Also, notice the nut/fastener difference -- the Stanleys have one long wing whereas mine has a double winged nut.
I also found some by the Star Tool Co. that have the pins in the brass: http://www.tias.com/8600/PictPage/1922854156.html and it seems like the Goodell Pratt Toolsmiths also used pins: http://www.jonzimmersantiquetools.com/tools/bevel_18_a.jpg. The Star Tool Co. one also has the owner's name engraved like mine but maybe that was just more common at the time and not specific to any company.
Beautiful! Are you a Guild member? If so, would you recommend it? It's pretty pricey when there are tons of amazing plans and tutorials out there for free.
I'd love to get into more finer-woodworking in the future and this piece is great inspiration and a great motivator. Nice work!