Dick has updated the 334A subset with 101A induction coil and new capacitor. Although I don't disagree that this improves the quality (by changing from sidetone to anti-sidetone), seller failed to disclose that--says it is "all original" except for the cords. When WE updated these subsets, they added an adaptor plate for the 101A and the subset was recoded from 334A to 434A.
This seller does very nice restoration work, from a technical perspective, and advertises them as originals, but often fails to disclose where his 'creations' depart from real originals. Another example is his 102/B1 on eBay right now. He features in the auction title the 2HA dial, which is the marking on the finger stop, but the dial actually has the face plate for a 2HB dial. Either he should have changed (a) the face place or (b) the finger stop, or (c) should have not mentioned the dial version at all and let the buyer figure it out, or (d) openly state the discrepancy.
He goes into great detail in his description how this dial was all original and expensive today, and how the set " HAS ALL OF THE DESIRED FEATURES", when this is just not so.
A buyer paying his prices for telephones should expect to get the real deal and a little more honesty.