No 4 valises - how old?

[BurtonP]

Thanks for your input. No, the stamps are pretty unclear, although my pictures could be better, see attached. The stamps are in the same spot on both valises, so I doubt the material is re-used. They are clearly very well used, dirty and oily.
I'm leaning towards them being Canadian, post-war, British design but US materials, and of very limited production numbers. Canadian airborne units at the time were limited, and seem to have a hodge-podge of US/UK equipment.
I wondered if the buckle fittings could be identified, but I've not found a match yet. I did find a stamp on the fittings though - AIC over a 1. Down the rabbit hole I go again...