Well, this took longer than expected, perhaps I should get a bigger mower.
Ransomes New Paris was being actively advertised in1886 and said to be suitable for long grass, as well as wet, dry and short. Available is sizes from 6" to 16" in two inch increments, this one is an 8". Seemingly very few of these survive but unexpectedly another the same size has just been discovered. Initially un-identified it is currently undergoing evaluation and conservation.