Still have my Colorflow filters - groovy!
And lots of other Spiratone goodies I inherited from my dad - Bellowscope and 150mm Macrotel short-mount lens, lots of filters in odd sizes (that's where I stocked up on Series V filters for my dad's Kodak Signet 35!) and adapters and stuff, Vario-Dupliscope, Vignetar. I can probably find other pieces if I dig deep enough in my junk boxes. We stayed away from the SLR lenses and the darkroom gear, but the other knick-knacks were handy and serviceable enough.