Arturia Microbrute

The Microbrute is a single oscillator mono-synth made by Arturia. It features a multi-mode filter, various oscillator modes and a patch bay for modular-style routing.

https://www.arturia.com/microbrute/overview

Roland SH-2

The Roland SH-2 is a dual oscillator mono-synth from the late 70s.  The sound of it is typical vintage Roland.