Yes looks like it's been looked after MM , there should be a few on the forum even the Green Wayfarer but as the image searches aren't working yet they are a little difficult to locate ,I guess only the images that you don't have to log in to view will be indexed on Google.
I think I've had over 100 Rover mowers and threw out about 30 of this model as I couldn't sell them even if they looked new as people weren't interested in the older mowers. I also had a few with the Suzuki 2 stroke motor, still have a few badges.
I'm assuming these mower bases were a variant of a Super Swift base as they are virtually identical and the catchers swap across.
Looks like it's from the eighties but the date of Manufacture is stamped on the cowl as a Code number just look at the first two digits to get the year, the number stampings are on the front or the side of the cowl.
Yes MM these model Rover mowers were around for a fair few years ,your one being 1990 , I preferred the ones with ball bearing wheels like the one in this 1989 ad.They are a good base I prefer these over a Masport Alloy base.
I'm surprised the 2024 SupaSwift is still using a Rover steel base that goes back to around the nineties.