It was the 150mm Schneider Tele-Xenar. A lovely lens. All of the Schneiders were really wonderful - a bit heavy (for today), but the 60mm was so special. Only one lens had a wee bit of softness on the edge, the 40mm , but it was quite a compact lens. the rest were part of a great 1990s lineup, and a significant update from the Zeiss lenses, mostly from a decade or two earlier (in design) if not older. The Mandelmann-Schneider-Rollei story is pretty interesting....
And yes, as you say, there are many 35mm lenses smaller, easier to use, and quite good.