Just barely within the 70s, there were at least two manufacturers that took tuner performance seriously enough that their upper-range receivers had dual-bandwidth IF stages in the FM sections. (A feature that, for me, separates interesting tuners from not-so-interesting ones.)
The examples I know about are:
- Yamaha CR-x40 series, from CR-840 up
- Kenwood KR-x050 series, from KR-6050 up
Don't know if the OP is particularly interested in this feature, but
I'd be very interested to hear if anyone else knows of more in the same vein. My own interests aren't limited to the 70s, but they are (mostly) limited to analog tuning - pretty close to being the same limit, as it happens. Oh, and I think I know most of the separate tuners with the feature - it's whether there were any other analog
receivers with dual-bandwidth IF that I'm curious about.
Cheers and thanks,
chazix