( Ball ) Blindee = French for jacketed bullet.
I have seen 2 .280 Halger rifles . They had the identical pistolgrip cap and magnum actions , Greener safety. One the same springtype cheekpiece.
The .280 Halger in Germany also designated 7x66.
The barell marking here shows different typos the 7x and the 64 make no real sense.
May have been 7x66 before rebored /rechamberd to .300 H&H in Belgium.
The .280 Halger case is nearly identical to the .280 Ross/Eley.
It deserved a magazinebox length of 96mm.
Halger rifles were made- among others -from Otto Geiger.