I honestly don't know, but...
I always thought it was a yonkyo that Takeda used on Charles Perry.
And apparently so did Ellis!
Ellis Amdur wrote:
Takeda, on the other hand, in 1903, taught Charles Perry Daito-ryu. As written in John Steven's, Aikido: The Way of Harmony, Perry demanded a conductor check the ticket of the shabbily dressed little Japanese man in the first class compartment. Sokaku, offended, confronted Perry, who "brandished his fists." Sokaku put him in a double yonkyo, dropping him to his knees and then throwing him to the end of the car. Perry apologized and asked to learn something of the art. Does this not bespeak well of Takeda? Unlike many of his successors, he was not racist in his teaching - if someone wanted to learn, he taught.
Actually, I really like the general idea of this thread. What we believe is "real" or "effective" is largely determined by what we perceive and how we perceive it.