The ejectors look to be the H&H or Southgate platform:

https://www.youtube.com/watch?v=nuIy2nRToaA

I'm sure there is some Gordian Knot there but I believe H&H & Southgate are one in the same or similar.

Dalys have the ole ejector in a box - Deeley:

Nr. 4289 of 1886 or N 6913 of 1888.

Cheers,

Raimey
rse