The excerpt is written in 6/4 (or, more probably, as pointed out by @dissemin8or, 3/2) time, but the visual complexity of the multiple voices can make things confusing to sort out.
As starting point regarding multiple voices, see Rest above a note in a piano piece
To help clarify the time signature, here are the voices all written separately.
And just for kicks, here's a colorized version.
The newly added excerpt is most likely in 2/4. A composer who specifically wanted 4/8 would most likely separate every eighth note to emphasize the "4 beats per measure" aspect, rather than beaming them.