Red October as a 1938 strategic shock

What happens if the United States finds Red October in Norfolk Harbor in 1938 and the discovery leaks?

The ship cannot be copied, but its apparent Soviet origin could trigger panic and a broad European coalition against the USSR.

American engineers could study the submarine but could not reproduce its nuclear, missile, and quiet-propulsion systems with 1938 industry. Once public, the vessel would imply that the Soviet Union stood generations beyond every other power. Germany, Poland, the Baltic states, and Scandinavia might form an anti-Soviet alignment around that perceived threat. Misunderstood future technology could change diplomacy more quickly than production.