I am sure this is nothing new as far as information goes, but I am finding it strange as to why there is no mention of Spittler.
I created that document in 2018 with the best available information. Most of which I researched.
If/when we ever figure out with certainty what King's "engraving" period was, we can update it. Meanwhile, King is known and recorded as a stock carver ~1900-1910 which has been verified.
The total extend of Spittler knowledge is within this thread. It's all brand new and mostly unverified. Whad 'ya expect?