If that's right it strongly suggests that more C is required across the LW oscillator coil to get the frequency down to 198+465=663kHz. If the gang's at about half way, it'll have about 250pF across the coil. If that's giving 928.5kHz, then L will be about 120uH. To get that down to 663kHz will need a total of 493pF, so about an extra 240pF. Making reasonable assumptions about strays suggests that the extra C should 220pF.
Hmmmm, 220.....22....
?
Dodgy cap or old mistake? Who knows, but try 220pF and see!