On eBay all the time, you see "unmarked Rookwood," and that's just bogus. Early on, the mark would say Rookwood, then from the mid 1880s on, it would have the Rookwood logo, a backward R and a P placed one next to the other, and variations of that along with the artist's initials and the date. There was a dating system, with shaped numbers. There were indicators of different types of glazes. Rookwood had a very good system that's fairly easy to understand. If you have one book on Rookwood, you get a pretty good sense of how the marks work, and you can figure out who did it, when, and what it might be called. Who collects Rookwood today and what are they collecting?Humler: There's some people with eclectic collections who look at a lot of different things. And others who are very specific about what they collect, they might just collect a particular type of Weller or Roseville or Rookwood or a particular artist or period. We're all susceptible to the disease and have different manifestations of it. I've personally had a longtime interest in things Rookwood made from about 1915 and 1930, which is not mainstream Rookwood, but they're things I like. A lot of new looks and new glazes were in vogue then.

VANDERMARK BLOWN ART GLASS VASE... BEAUTIFUL...ONE OF A KIND 1978 LV Liberty Village VANDERMARK Glass Pulled Feather Paperweight (J) Vandermark 5 poster, 2004, Arlington, VA, AP, LE, Ames Bros Pale Purple Vandermark Bottle Cased in Clear Glass P19N Beautiful Iridescent Paperweight Signed FROG Vandermark Merritt Glass Studios Slender Cut Purple Vandermark Perfume Bottle KEN VANDERMARK: OCCASIONAL POEMS (CD.) Ken Vandermark - Occasional Poems (CD Used Very Good) ID659z - KONSTRUKT KEN VANDERMARK - KOSMIK BAZAAR - vinyl LP 1979 Art Glass Egg Signed Vandermark ~Iridescent Turquoise & Pink Pulled Feather Vintage German Tall Floral perfume bottle master bottle ~ Never Used~ 7" DOWN BEAT Bill Evans Dirty Dozen; Vandermark; Murray & Blood Ulmer 9 2012 Beautiful Vintage Tall Vandermark Feathered Glass Iridescent Vase Signed 1978 Rare - Signed 15/250 Vandermark Burgundy Perfume Bottle Art Glass With Stopper Blue Vandermark Signed Perfume Bottle VTG PERFUME BOTTLES LOT 3 Vandermark Illusions Royal Limited Crystal Italy KEN VANDERMARK'S JOE HARRIOTT PROJECT STRAIGHT LINES (F34) 7 Track Promotional C VANDERMARK IRIDESCENT PULLED FEATHER 11.5 inch FAN VASE Vandermark Pulled Feather Stretch Art Glass Bowl - INCREDIBLE! 10.5” Vandermark Merritt Glass Studio NJ,egg paperweight,signed VMS,purple wht swirl Lovely Attr. Vandermark Iridescent Pulled Feather Art Glass Shade 6 3/4"x9 1/8" VANDERMARK PERFUME BOTTLE COLLECTABLE DECORATIVE HAND BLOWN WITH STOPPER Vtg VANDERMARK STUDIO Iridescent Art Glass Flared Vase, Wavy Pulled Stripes 1976 Vandermark Porcelain Dwarf Gnome Sleeping Porcelain 1974 THE VANDERMARK FIVE 5 Target Or Flag CD Golden Iridescent Vandermark Signed Candlestick VANDERMARK Glass Iridescent Pulled Feathers Paperweight Signed VANDERMARK ART GLASS PERFUME WITH FLOWER 1 of 4 84 Vtg Signed Vandermark Faceted Flower Art Glass Studio Perfume Bottle Beautiful Vandermark Studios Glass Egg Sculpture Iridescent Signed 1976 Nice 1975 Press Photo Young visitor admires bottle created by Jerry Vandermark The Vandermark 5 Five Alchemia Box Set 12 CD Complete Recordings Krakow, Poland Tall Vandermark Studios Pulled Feather Iridescent Vase Vintage Watercolor Landscape Signed RSH 1948 (Ruth Sterling Hawley) "Vandermark" `Ken Vandermark, Madi Ensem...-Guillermo Gregorio - Coplanar (UK IMPORT) CD NEW `Ken Vandermark, Madi Ensem...-Guillermo Gregorio - Coplanar (UK IMPORT) CD NEW 1977 VANDERMARK SIGNED BLUE PULLED FEATHER SWIRL STUDIO ART GLASS PAPERWEIGHT Signed Vandermark 1981 Large Iridescent Glass Footed Bowl Pulled Feather Ken Vandermark: Parallex Sounds =CD= Ken Vandermark & Terrie Ex: Scaffolding =CD= Franz Schubert: Trout Quintet and a Minor Quartet (Vandermark Oconor) =CD= VANDERMARK PEACOCK FEATHER PAPERWEIGHT: Iridescent Aqua, Rust, Wht.,3 1/8", 1976