Tondu  Vorgeschlagen von pilaster 
TS Ornitons Heavy  Vorgeschlagen von m_knox 

I suspect that, since this dates from 1971, it will be hand lettered. Tondu is only similar, not an ID. Hopefully, one of the more knowledgable gurus here will get you something closer.

One of my first vinyls...

Variante de Kabel

Black flavour, if we feed it enough pies:
http://myfonts.us/td-vNn1ML

aka Cable Heavy