One way of getting an idea of the age of a Britishicon/British Commonwealth cap badge is by looking at the crown because it normally changes slightly in style when the Monarch changes. For example the crown on a George 6th era cap badge is slightly different to the crown on an Elizabeth 2nd era cap badge. Presumably the crown changed on a badge from Queen Victoria to Edward 7th then again to George 5th and so on.

Why not mount the badges up in a frame and, perhaps, include a photo/tribute to your uncle in the frame.

I while ago I picked up several WW2 service medals from an antique shop which according to the vendor came from the same source, the family of a deceased WW2 veteran. I did try to find out the name of the veteran but the shop owner didn't know and the people who brought them in didn't return to the shop. I didn't think much of the family for getting rid of their relative's medals for a tiny amount of cash and the veteran probably went through hell to earn them.