National Panasonic - A cheap Technics, really...

Yes that's right... a C7 blank tape.  'For Recording' it says on side 2 - yeah, really useful...  Side 1 has a poppy arrangement of some classical tune or other with a nice elasticy bass sound.

Supplied with my Grandad's NatPan SG4080L music centre in 1975, from Rumbelows.  Blank on Side 2, natch, and ended up with an episode of On The Move recorded on it for many years.  However, Side 1 has some wonderful big-arrangement tracks on it.  Ave Maria is particularly good, all wah-wah, bongos and Hammond C3 and after a great snare/tom tom fill goes into a Santana-styled total-freak-out-meltdown of a fade out with the plank-spanker really giving it some serious welly.  And it cleans your heads.