I commuted on a 69 Raleigh Sports to grad school & work back in the early 80s & it had a B72 saddle which appeared to be original equipment, well broken in & a perfect fit for my sit parts. Most comfortable Brooks I ever rode, still kick myself for not swapping that saddle when I sold the bike. I am using a seat sandwich & B72 with the original Laprade single rail seatpost on my Expedition Touring bike. Works well. Don