Here's a picture of one of my old Liberty Cards from Jan. 1956.
I see it is not the oldest, but perhaps close to being there. I was T.A.D. to NAS North Island for joint exercises with 3rd M.A.W.
(See Newspaper clipping)
Not sure if it meets your criteria for Posting to Newsletter but you can place it in your archives for posterity if you wish.
Joe Miller , Cpl, 1482458, USMC