The M31 gallery of...
1961 8TM-41, 1960 8TM-294B
The Penny's version had a metal grill which was painted aqua -- and a painted grill is always an indication of going that extra mile...
The (middle) 8TM-41 came out a year after the other two, but it looks like it should have preceeded them by a decade or more. The photo doesn't show it, but the 41's sliderule tuning dial could feel right at home on any 1940s US tabletop tube radio...
All three models are 8-transistor radios.