Sounds strange.
According to the Radio Museum the Invicta model 60 is a console version of the model 38 table-top set, and they are MW/LW/VHF, but according to this auction listing
https://www.worthpoint.com/worthoped...age-1775440512
the Model No 60 is a LW/MW/SW set.
The RG suffix might imply radiogram.
Perhaps you don't have the original back-cover.
Some pictures of the front, chassis, and back cover would help.