Hi to Shedpest and grumpy, That is indeed an aluminium chain case cover, and considering that this machine was first produced in 1950, was very classy! The Model 17 Supercut (petrol) was a professional machine with some great features such as 2 clutches;(you will notice 2 levers in the pics)the first operates the cutter clutch, and the second operates the roller clutch, to allow traversing across the lawn without the cutter reel engaged.
Shedpest on a great score!
