The model of this Apple is A2S1 – This is the first of the Apple’s made after the Apple 1 kits. The Serial number of this unit is 1295.
The series 1 had the distinctive Power Key, the later models had a flat white power indicator.
The unit still works – the disk drives we not part of the original kit, but I think the monitor is. There are old Apple ads which show the sanyo monitor.
This was back in the days when you had to use cassette tapes to store files and sometimes you would have to reseat the RAM chips it it failed to boot.