Restorers Brass Threaded Caster has a 1" porcelain wheel and the top is threaded for quick installation.
Restorers Brass Threaded Caster - 1 Inch Porcelain Wheel
Tradco Screw Plate Castor with Brown Porcelain Wheel, 25mm
Square Antique Cup Casters, 1-1/4 - Paxton Hardware
Antique Furniture Casters with Porcelain Wheels and Brass Fork Metal Stem
Set of 4 Solid Brass Swivel Caster Heavy Duty & Safe for All Floors Perfect Replacement for Floor Mat Polished Brass Finish Wheels for Chairs/Tables/Furniture : Industrial & Scientific
Wood Furniture Caster with Ball Bearings – Restoration Supplies
Casters Archives - Timely Hardware
3M Scotch-Brite SB27610 ~ Radial Bristle Disc RB-ZB 1 Inch x 1/8 Inch (36 Grit)
Set of 4 Solid Brass Swivel Caster Heavy Duty & Safe for All Floors Perfect Replacement for Floor Mat Polished Brass Finish Caster Wheels for Chairs/Tables/Furniture : Industrial & Scientific
Antique Furniture Casters with Porcelain Wheels and Brass Fork Metal Stem