The Mini Pops 3 from Korg aka the Univox SR - 55 released in 1967 is a 4 voice analog drum machine. It is a preset only unit but the user can combine patterns using knobs for some of the preset rhythms.
Its original slanted front panel was designed for sitting on top of an organ if desired. It also has two outputs for high and low impedance and a foot switch jack for starting and stopping rhythms.
This particular unit is in perfect working condition. It's only blemish is a knick on the front right corner.