Hi all,
well I went and had a look again today. Took more photos and perhaps most importantly, got the serial numbers- or at least the numbers on the engine casings.
Took pictures from most angles and some of items people have indicated elsewhere aid in identification. I'll post the pictures later, in the meantime here are the serial numbers- do they identify correctly with the preliminary identification?
Left mower (prelim: model 5 series 1)
upper half: AC57407
lower half: 6
Right mower (prelim: model 4)
upper half: 119754
lower half: 2
Thanks,