Very interesting thread. A friend of mine has Harry Hill's last time trial bike (A Harry Hall?) fitted with a monster (for its day) chainring. HH was racing in TT's well into his later years and doing very well in veterans events where the riders' ages are taken into consideration for the result.
I like the Cyclo catalogue posted earlier. Very interesting to see that even in 1949, by using the BW rear hub, it was possible to get a 12 up straight through 5 speed 'block'. I thought the 12 sprocket only appeared in the 80's!
If anyone is interested, here is a cutaway view of the BW hub. With a set of sprockets and a couple of chain whips it seems possible to fit a large range of gearing to suit whatever terrain was in the offing. Years before Shimano 'invented' the idea! And 3 sets of bearings to offset the stresses of an 'outboard' block.
I've posted it before elsewhere but it seems relevant again.