As [sjm4306] says, “You can never have too many clocks based on obsolete display ... to user a bigger VFD you need only make a new riser PCB. Figuring out the proper way to space the through ...

This build from [mircemk] is of the latter variety, repurposing a VFD display to do the job. The project is built around a VFM202MDA vacuum fluorescent display, which provides that lovely green ...