Bullet Engine Schematic

We did not ride out to Adamstown but I ended up there Sunday afternoon doing a little antiquing with my wife.  It would have been a nice ride on the Bullet but not very practical if we had bought something like a framed poster.  Not that I bought a framed poster but I came close.  As I was wandering about one of the shops, Adamstown Antique Mall to be more precise, I noticed high on a wall an engine schematic for a Royal Enfield Bullet.  They wanted $75 for it and I thought that was a little much for a disintegrating poster but it sure was cool.  It appears to be English and from the fifties.  Here is a fuzzy cell phone picture of it.