For anyone interested, a seller on ebay has just listed fifteen or more original turret manuals for a variety of turret types. They are listed individually, not as a group. I've never seen this many originals come up at the same time. I'd love to have originals of every turret type that I have parts for but I just can't afford it. I'll try to bid on some but I'm sure I'll get smoked quickly so remember me if you win the bid on any of these, I'll buy copies or trade parts for copies.
http://shop.ebay.com/merchant/jamminpower