It should have fitted our oven. It didn't fit the oven. Most sneakily the handles made it just a little wider than the advertised 'standard' size. And that's how the typewriter cleaning process got upgraded with a deluxe 'cleaning pan'.
With a machine on the grille, the pan catches any dirt or liquids being used. Good thing to do another cleaning session on this machine - otherwise would not have spotted that the screw that holds the margin bar was working itself loose. It almost made it, such a small screw falling off 'd be unlikely to be found again. (It's small, right in centre of picture.)
Also an opportunity to give the insides another light cleaning. The mechanism of these Corona portable typewriters is really brilliant. These little wire linkages are what prevents any bounce-back of the typebars, a mechanical one-way function.
With the 'leaking tray' under the machine, all parts got a clean. These later, all-black Speedline mechanisms do look neat, impressive when viewing underneath the 'internals'.
Cleaned for passing it on...
(If curious, listing here - for as long as it's up of course...)