The film by Brakhage commonly referred to as "Wecht" does indeed exist. It doesn't have a titlecard at the head, and the leader of the original is labeled "Portrait" in Stan's handwriting, so I'm not sure where the 'Wecht' title comes from. There is a 'by Brakhage' at the tail. The film is 102 feet long, and has only one splice edit, about a third of the way in. I'm not sure what interest there might be to see it, but the film will not be going into regular distribution, as Stan clearly didn't see it as a work he wanted to make widely available.
Stan Brakhage
Director
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The Yeti61%
Autumn in New York61%
Xiu Xiu: The Sent-Down Girl72%
Tangled Ever After71%
Heatwave62%
Public Speaking70%
Southbound59%
Moonlight in Vermont61%
The Last Stand of Ellen Cole80%
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IMAX Hubble71%
Playing with Fire65%
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A Dry White Season67%
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The Safety of Objects65%
River of Blood59%