Hello Hepsibar and Norm That's great and it has helped me better understand the A-V model numbering system.
The '2M14' tells us this is a Mark 2 Villiers Midget with 14"cut. A-V also made a Model G at this time. It's now clear this referred to the smaller 70cc Villiers Model G engine.
Note the change in address of the later serial number machine.