This link will give you a gazillion vintage radios (keep scrolling down) -- no McIntosh that I can see though: https://picclick.co.uk/Collectables/Radio-Television-Telephony/Radio-Collectables/Transistor-Radios/
Don't think so. Just possible you mis-remember Magnavox as McIntosh after all these years.
Perhaps Midland.they made portable radios back then.
When I was fifteen in the early 60's my grandfather and I built a new cabinet for a table top AM tube radio I used in my basement. My guess is that the same thing happened here but, as suggested earlier, the owner stuck a Mcintosh speaker logo on it for fun. I have have heard of stories where car owners would go to a junkyard to get an MB S560 rear logo and stick it on their car.Again, it was a wooden box covered with green and cream cloth. Green on the back/bottom, cream in front for speaker. A few push buttons for LW or AM radio. McIntosh 3D logo.
Can you find a logo online that looks just like what you recall?
In the 65 years since my first portable radio, over three decades as a Ham, 60 years of SWL and BCB DXing, I have never seen or heard of a McIntosh radio.
I, too, think that the thing was "badge engineered", if the recollection of the logo after all these years is still accurate.
Possibly the most plausible explanation, it could have been a one-off project by an employee.Perhaps. But again, why? The only thing that would lend more credence to this would be that when I had this radio, I lived in upstate NY near McIntosh Labs. I suppose some employee there could have done this for fun. And the radio ended up with me. It sure sounded amazing. And that logo was affixed professionally. It looked genuine to me. But anything is possible I suppose.