Originally Posted by
JohnDThompson
No, it's a copy of the TA Pro-5 arms, made in England for Lambert/Viscount.
Yes, that's the definitive proof.
Unfortunately, there are. Some Lambert/Viscount cranks and spindles were square, but untapered. As you might expect, they had a tendency to spontaneously loosen.
Ok, I stand corrected! As a former aerospace engineer, I am shocked.