Most interesting .......... please enlighten
You asked for it
@finnbear270 
Many moons ago, when my parents first started working together, they had a stamp made to mark their work. The company was named after my mum, Pat Mitchell.
This is it, and when I say 'cut,' it was cut by hand, with files, by a fella named Victor Mather; it is a perfect representation of what was, my mother's handwritten signature. We used it, and later versions of it, for many years.
After we lost my parents, and I was running the business, things were changing; my work was changing along with the market I was supplying. I was making custom knives, but still using that Pat Mitchell stamp. It became apparent that my customers were now expecting to see my name on their new 'soul authorship' knife
So after much soul-searching, Pat Mitchell (Cutlers) became Stuart Mitchell Knives.
The mark you see on the forged knife is the first SM logo. It is difficult to make out, but you might notice that the Mitchell portion bears resemblance to my mother's handwritten Mitchell; that isn't accidental. The Stuart, however, was simply made up in order to look similar to the Mitchell.
Thing is, I never really liked it, thinking back now, some of that could have been because of how it came about, maybe I resented it a little? But I never got on with it. In 2013, I decided it was time for a change. 2013 felt particularly like 'the time' as it was the stainless steel centenary year and the works and my workshop were quite involved with all that, the works having the Harry Brearley/stainless steel connection.
So I developed a new one, which is the one you see today. The Mitchell, being a perfect copy of that original, struck mark, Mitchell, as I can get. But I didn't want to dilute that this time by making a similar Stuart, so I chose Gil Sans for the Christian name portion. Gil Sans being an old and historic font, and I like the story of how it came about.
Later on, steel grade was added as I saw a few knives changing hands online, pre-owned with incorrect steel grade information, so I added it as part of the blade mark to safeguard buyers, I suppose.
