PeterM
The steel wheel in your photo is an earlier version styled steel wheel.
The later versions fitted to all the Escorts as standard are as in the following photo.
There is a difference in the raised profile between the blackouts.
As best I can tell from the crappy images I have, the 1980 catalog shows both types of steel wheels fitted, although not to Ghias, which had alloys by then. Personally, I prefer the ones Ratta is looking for, although they are too skinny and could have more aggressive offset.
EDIT: The Feb '79 catalog images I have are much better, and clearly show the early styled wheel. These are newer cars with square headlamps, and the wheels are shown fitted to Ls, GLs and Ghias. There is no sign of the revised wheel in the catalog, so I've no idea when production switched. A relative had a very late 1980 model Sprint pack, and it had the revised wheels Peter wrote of, as did most other Escorts of the late 70s if my memory serves me.