Launched in 1972, the MXR Dyna Comp was the original guitar-pedal compressor, and is still available from Jim Dunlop's revived MXR line.
This is the more expensive Custom Shop version as opposed to the standard M-102 Dyna Comp (£74), and is faithful to the 'script logo' original - with the same components, battery-power only and no LED.
This pedal shows MXR got it right from the start when it comes to guitarists' needs: it thickens tone and gets squishy if you need to, with a note attack that can have a pronounced snap but still sound natural.
Basic facilities for sure, but it does the job very nicely.