The only stock makers I was aware of who used that dished cheekpiece are Robert Milhoan and Paul Jaeger, but I don't think either of them made that stock:

Milhoan



Jaeger





The photos in Volume II of Petrov's "Custom Gunmakers of the 20th Century" are dark enough that I had never noticed the same kind of cheekpiece on James V. Howe's rifles. I will add my voice to the chorus of "Howe" opinions.