would have been class of 81 if i’d hung around that long. Got a similar one for Christmas one year and was amazed it could do times tables with just a transistor battery. school seemed a waste of time. besides ‘shell oil’ joke, my little brother discovered(autistic?) by holding some buttons and cycling the on/off switch, it could start ‘counting’. rapidly flashing the first digit while the other digits would keep increasing. we left it increasing for days until the battery died. got me interested in computers which later paid my bills and finances my retirement. fun to think back on.
Tandy corp. Parent of RS. no idea the origin of hardware. My wife worked for Tandy a while(1980) in Fort Worth Tx, shuffling paperwork for peanuts.