Amateurs.
You have so much information!
Only my most recent, and this one was easy.
A few Sundays ago these photos got me riding five miles to see which Acer Mex product I was going to strap on the back of my similarly sighted '84 620.
As I rode up on it, I noticed the probable Crane RD had been swapped out for a pristine '84 SR with the titanium bits.
I had no problem forking over $40.
Nine holes in the BB shell and a stamped "23" informed me it is a '73 and precisely my size.
Shimano "AF" dropouts suggest it is a (sic) Carabela Profesional.
Congratulations on your Bruce Gordon! I look forward to seeing closeups of the seat stay cluster when you initiate your build thread.
(I invoke Poe's Law with regard to my "Amateurs" aspersion.)
Great thread! (Almost every bike I find is through a "Bad Ad!")