Owl & Twig
The Field Guide
How to identify, date, and value the things you find. Written from what passes through our hands, one estate sale at a time.
FeaturedSeller's Desk
Find us in Waterford: our new booth at The Rabbit Hole
The Rabbit Hole in Waterford Township is doubling its floor space and adding 23 new vendors, and Owl & Twig is on the lineup. Booth pieces are sold in the store only. Reopens September...
Nothing in that drawer yet.
GlassJadeite Glass: McKee Made It First, and Fire-King Still Gets the Credit
By Matthew Partsch · Owl and Twig Vintage · October 2, 2026 McKee Glass sold the first opaque...
GlassHeisey Glass: The 1911 Patent Behind the Shine, and the Mark Imperial Kept Using
A.H. Heisey patented the fire-polishing process behind its glass's signature shine in 1911. What that patent can't settle...
GlassVaseline Glass Got Its Name From Somebody Else's Trademark
Uranium glass predates its best-known nickname by a century, the first documented American patent for it dates to...
GlassPyrex: The Mixing Bowl That Was Never Actually Pyrex Glass
By Matthew Partsch · Owl and Twig Vintage · October 1, 2026 A 1919 patent protects a glass...
GlassAkro Agate Marbles: The Company That Started By Reselling Its Rival's Glass
By Matthew Partsch · Owl and Twig Vintage · September 30, 2026 The crow-and-marble trademark on every Akro...
GlassThe Viking owl glimmer: the seven-inch bird that outlived the glasshouse that made it
Viking Glass introduced its two-piece owl fairy lamp, catalog number 6900, around 1970 and poured it in the...
GlassVintage coffee mugs: four things to check before you buy
Nobody flips over three hundred mugs. Four visual cues — color, shape, words, and technology — do almost...
GlassGlass owl on nest: how to date one and tell the makers apart
The hen on a nest sold by the thousand. The owl did not. What survives came from a...
GlassFive hen on nest rarities actually worth chasing
Most hen on nest dishes sell for $20-60. These five real categories — a one-of-one Greentown mold that...
GlassSteuben glass: the one fact that dates almost any piece
Steuben's hundred-plus-year run splits cleanly into two eras that collectors treat as almost different companies. Color or clear...
GlassMoon and Star: the signature tells you everything
One pattern, four makers, a hundred and thirty years. The current producer signs every piece specifically so the...
GlassBlenko glass: no mold seams, and a scar on the bottom
Blenko is blown into a wooden mould and then spun, which erases the seams. That, plus the pontil...
GlassFairy lamps: a candle salesman invented an entire collecting category
Samuel Clarke did not set out to make collectibles. He wanted to sell more candles. Here is how...
GlassViking glass never signed its work. Here is how to date it anyway
No moulded mark, ever. Just a paper label that fell off decades ago. Colour, form and one very...
GlassSwung vases: the seam test that settles it in five seconds
Every mid-century swung vase carries a mould seam that fades as it climbs. If the seam runs all...
GlassThe Tiara honey bee box, and why collectors chase it
A Victorian pattern, revived in the 1970s and sold at kitchen-table parties. Here is how to date one,...
GlassHen on nest: how to tell a real one from a reissue
The covered hen is the most reproduced object in American glass. The question is never whether it is...