Pre-recorded reel - reel tapes (Downley HP13)

Around 30 easy listening pre-recorded reel to reel tapes on 5 inch reels. However the reels are not full; each tape is about the same length in time as an LP for which they were obviously a replacement. I have no idea of their age or quality but I think I acquired them in the 1970s when cassettes were taking over. Quite clean. Have one, some or all.