Sizes of Thumb Wheel Radios

I bought a Thumb Wheel Radio recently from one of our members thinking they would all be the same size. The one I got is 9 inches wide by 2 5/8 inches tall. My dash opening in a 1970 Rally dash is only 7 inches wide and 2 inches tall. Does anyone know what the larger one fits, and what years has the same size as the 1970? When I learn a bit more I will offer the big one for sale in a new post. Likewise, a want add for the smaller one.

The parts manual says I need part no. 2884 931 am, but I don’t find this number for 1971 or 1969 radios.