Thanks to all who responded, especially Rick and Jim for providing either excepts from the book or a link to the digital version of the book. I went to Charlie's today and he has every damn book DeHaas ever published. I went thru the three on single shots and gunsmithing and unfortunately, none have any original drawings with dimension. Then on the way to lunch from Charlie's I got a call from Gary Quinlan. I thought he might have some Winchester drawings. He does, but all he has are for their telescopic sights. We talked for quite a while about these extractors and I asked him about John Campbell and if he had a way to connect with him. He said he has not really spoken to him since he helped with the 2 books John wrote. John actually came to see Gary and see is drawings and 1885 collection. Gary did say that Cody has all the Winchester archives. So, I suspect that the museum rep I spoke with was simply not aware of what is availble in their archives. He may only know what has been digitized. I think I may try again and this time by phone instead of email. If we didn't just get a new pup, I'd be thinking of taking a flight out to Cody to dig thru the archives myself. I still might do that.
I have two more extractors headed my way in a couple weeks when by buddy Bill gets back from FL. I'll measure up those two and do the same comparison to mine using the pivot pin to establish equal alignment.
Thanks again to those who responded.