Until yesterday, it was however also totally unknown to me, that HMV in fact HAS manufactured what is very close to a circular gramophone (semicircular), from around 1930, that is electrical! I will not have a strong opinion about if this model ever was the base for the asian circular crapophone or not, but I still felt it could be interesting to have a look at it,for those who are unfamiliar with this unit, even if it is electric and strictly thinking, falls outside the scope of this forum.
Myself, I think it is kind of cute, and one can also recognize familiar parts from the acoustic HMV gramophones if having a look at this Youtube video. A big warning though, when the owner starts to play a record, the sound is awful ! https://www.youtube.com/watch?v=vTOswybanZs
So here it is, the semicircular HMV Model 122A

PS. I do not own this machine, and don't intend to buy it.