Amdek CHK-100 Chorus
The Amdek series of pedals was produced by Boss in the 80's as a DIY approach to pedals. They were sold as kits and generally used original Boss circuits. The PCB's came assembled and the buyer simply soldered the hardware and screwed the pedal into place.
The CHK-100 the chorus pedal from this series and features a similar layout to the Boss CE-2 with the addition of stereo outputs. Tonally, the CHK-100 remains true to the CE-2's tone with a slightly brighter response.