Gun Staves

[rob love]

I was out at my favorite scrapyard yesterday and found a box with a set of 3 NOS staves in it. The box indicates "Staff assembly" and part number C97385.
Two of the staffs have part numbers on them of B110688 and the other B110689. They are wood with steel ends about 48.5inches long and about 1-1/2 wide.
Can anyone ID what gun these are for? I could not find them in my various manuals.See attached photos.

I must have a hoarding problem because when I went out to the corner of the shed where I keep the artillery stuff, it turns out I have 2 more sets of these. They must have been for something in Cdn service, and are too small for 105 and 155. They do not match the part numbers in my Sherman gun manual. Could they be for Staghound?