This is a redesigned circuit board for the CGS59 Programmer/Sequencer. Unlike that version, this one has no panel-format specific PCBs. The column boards have been replaced with boards that contain 8 stages. These can be used to drive pots or switches in any panel configuration you wish.
One CGS87 Component/Hardware Kit provides an 8-Stage Programmer/Sequencer. Multiple CGS87M Component/Hardware Kits can be added with each kit adding 8 additional stages.
CGS59 Datasheet and Build Guide