CB500/550/750 rear brake plate

[Ewan 500 K1]

here's a bugger. Polished up my rear hub and respoked it with a new rim. Then, dug out a better looking brake plate, polished it up, went to fit it to the hub and ... it disnae flippin fit.  It does look a bit different (see first photo)  and is stamped 398 . Anyone know what models this fits, is it off a 550 or 750 four ? ...  anyone needing one of these.  Me ? ... I'll need to polish up the original brake plate (photo 2)

[SteveD CB500K0]

I always look up those three digit numbers in the Honda Model Number List

Doesn't work this time though as 398 was a CG110 (?)

[Ewan 500 K1]

from what I can see from CMNSL parts diagrams it looks like a CB750 brake plate ??

[Ewan 500 K1]

oki doki , got it sorted. I've been mis reading the number stamped on the back , it reads 393 not 398.... so, its part number 43100-393-781  and fits the following:

CB550F A (77) MOTORCYCLE, JPN, VIN# CB550F-2100001 TO CB550F-2114871

CB550K A (77) MOTORCYCLE, JPN, VIN# CB550K-2000007 TO CB550K-2015308

CB550K A (78) MOTORCYCLE, JPN, VIN# CB550K-2100001 TO CB550K-2122082

CB750A A (77) MOTORCYCLE, JPN, VIN# CB750A-7100001 TO CB750A-7110560

CB750K A (77) MOTORCYCLE, JPN, VIN# CB750-2700009 TO CB750-2729534

CB750K A (78) MOTORCYCLE, JPN, VIN# CB750-2800001