Sorry I'm late to the show on this inclusion, (soon for exclusion as it doesnt meet criteria). Yourself Jack and the Holy Bible itself Tweedales, are my go for knowledge so I don't doubt you but would love to know more! Is the pattern unique to later ww2 period?
Thinking similarly as above I placed it in that time frame. It's buttons are very similar in appearance and construction to some similar chequered patterned period slide knives. It was a heap of rust when it got it too, I was delighted it still had snap once squared away.
For the life of me I cannot find it now but I also distinctly remember finding an outline of a patent for this wraparound style knife either for Brookes himself or from that time frame. It eludes me now but I'll keep digging. Anyway love to know your reasoning
In meantime I proffer a wonderfully aged if humble pen knife made by the Rogers. The ivory is gorgeous. I don't think I've posted it here. Like most of my small Rogers collection it's an absolute scalpel.
Galvanic, I'm in awe of your knives in general but these ones from Army and Navy are super. A feature I love on some of these finds is inscriptions of name. What is wonderful is when they can be linked to an individual.