I have no idea what the purpose of that "notch" might be - like some others - it just grew on me. There are some distinct styles of the Number One - stock patterns, sights/no sights, etc...

Mine sure makes me grin when I shoot it, at the range or afield:

[Linked Image]

Very viable as a serious hunting rifle too - not just a collector's piece, not at all.

Regards, Guy