The machine itself has an interesting keyboard layout. This machine looks like it hasn't got all its marbles in a row and is missing one to boot! Looks like somebody creatively shuffled all the keys around. The letter keys clearly are later replacement keys, a modification to what probably originally was a standard US keyboard layout.
Compared to a 1938 glossy Speedline, it is rather austere and severe in appearance. No stripe on the cover, much of the originally glossy metal parts are simply black. Has a rock-hard platen and no linespacing ratchet, but still works otherwise. The threading of the ribbon suggests some neglect and 'uninformed use'. Again austere, no 'Floating Shift' logo on the strikeplate.
The serial number was again a surprise. It confirms this as a Standard, but the number 3C300146 would put this as manufactured towards the end of 1942. (Thank you Typewriterdatabase!) By that time war production was in effect with the few typewriters then being made new intended for government (military) use only.
That could all actually tie in well with the confusingly charactered keyboard. This is not a joke (probably), but it is a Belgian keyboard layout. Not found any primary sources for this, but this is referred to as the 'Valley' layout. Created in 1890 for speed (yes), this would have been an archaic and rare layout by the late forties I suspect.
Being made in 1942, this likely was used by American forces. Probably then made its way to Belgium in '44 or '45. Then it somehow stayed behind in Belgium and got a Belgian keyboard layout. From the dealer label on the ribbon cover this was possibly done by Richard Boudin, Office Supplies and Equipment at 70 Rue Du Grand Central, Charleroi.
Perhaps not a parts machine...
First a clean-up and maybe then have a go at repairing this. To replace the ill-fitting replacement keys I think I can manufacture new plastic key inserts. Now to go hunt for a Corona key ring. :-)