Joe, my print is difficult to read; but my 1900AE barrel/breech is shown below. It is of the 'flat' extractor style, and looks pretty simple from a machining standpoint.
My post above deleted for incorrect information. I do have the flat extractor print. Email me at the address I gave you if you want it.
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I like my coffee the
way I like my women...
...Cold and bitter... 
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