Mine has front discs, a slightly larger, 1641cc, engine with 1-2-3 ignition and Litesteer power steering.
That's fine for my usage, mind you living in Norfolk means the nearest motorway is at least an hour and a half away.
I've got a pair that I got from Kieft and Klok many years ago. They're NOS but with storage marks. At the time they cost me over £100 each !
They're not going to be used now as I've converted to post 68 spindles.
The going rate seems to be 90-100+ quid a pair plus postage for NOS ones when...
Maybe there's a useful nugget of information amongst all that droning on. If so I've missed it as I lost the will to live part of the way through.
I've read technical manuals that are written in a far more interesting manner.