Hi Ian,
Unknown A: is post WW2 ATCO Lightweight mower with a Villiers Midget kick start 2-Stroke engine, I would suggest early to mid 1950's because it has the later pepper-pot muffler rather than the earlier bullet shape. wink

It is missing its bullet shape fuel tank, cylinder reel, cutter sprocket, primary and secondary chains, and chain case cover. I don't know if you have the aluminium catcher for it.
the poor old thing looks sad! cry
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin