How long in terms of time was a Betamax L750 tape?
90 mins in "B1" mode.
Or 180 in B2, which was the standard speed on most machines after a few years. And that was the NTSC speed, a bit of research shows PAL/SECAM B2 was 195 minutes on a L-750 tape. In fact all the references I find only list the one speed for PAL/SECAM, so was there ever a B1 or B3 equivalent on PAL machines?