Welcome to the A-BN. Not too big a collectible demand for Seventies Liebfraumilchs, I don't think. I did notice there's someone trying to sell a similar one at a really wishful price point.
Thanks for the info Surfaceone. Wasn't expecting it to be worth much, but still an interesting bottle in my opinion. It will fit in nicely with all my other inexpensive bottles.
I noticed in the timeline on that link,
"1970 Production is already 240,000 bottles a year The Black Tower ceramic bottle gives way to black-tinted glass".
Could it be a wee bit earlier?