To update and slightly hijack this thread:

So I found a Brooks B15 Champion Narrow at the local used camping gear store for $50, which seems to be on the lower end of the current eBay prices for leather saddles. Hoping to get it on my bike for the ride home tonight. The thing is in wonderful shape with just a few scuffs and scratches but no cracks or tears and no butt marks from a previous owner. I'm having a hard time finding any info online about these saddles - seems like they've stopped making them. There's a "D 64" stamped on the back rail - is this a date code? Did I happen upon what looks to be a NOS saddle that predates my 35-year-old bike by a decade? Not that I care how much this thing is really worth (it's mine now and I'm not selling it), but it's nice to know.

Ok, maybe not sell it - but I will trade it for a NOS '73 Raleigh Professional in mint condition with Jennifer Connelly's home phone number written on a piece of paper stuffed in the steerer tube.