I have several pouches that I got at a garage a few months back and have googled till my fingers have bled with no luck identifying them. Can anyone help?

Two of them are identical but with slightly different markings. They are both marked on the strap and under the lid. One is marked, " LIGHT 1 G&S 6/43. 57 IN". The other is marked, " 57-IN LIGHT 11 H&S 3/43 I.W."

They measure approximately 11" x 5 1/2" x 4 1/2"
I'm guessing they were made in 1943 and are from the US or UKicon because of the English text.
Can anyone ID them for me? Thanks in advance.Attachment 75404Attachment 75403Attachment 75405Attachment 75406
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