With respect - I beg to differ on the brass screws - nearly all of my Empire’s brass throttles are bent or twisted. I had
@Paula work on one and she mentioned brass being the problem with the prolonged heat. So I tend to believe her but that’s all I really know.
I just bought a butt load of Weedens off eBay, not a 672 but other nice examples with an electric motor & accessories. Ugh, so much for not buying more but it’s a nice package deal.
Thanks for the photos Charlie - you have one with a governor? So I assume no earlier than 1935