Caster Cups / Piano Castors (Alternative names: Furniture Casters, Glass/Bakelite Caster Cups)
Other (Furniture Hardware/Accessories) · Mid-Century Modern / Industrial (Mid-20th Century) · Unmarked generic manufacturer, commonly produced by various hardware and plastics companies in the mid-20th century
Type
Other (Furniture Hardware/Accessories)
Style Period
Mid-Century Modern / Industrial (Mid-20th Century)
Material
Bakelite or early synthetic plastic composite, molded construction
Age Estimate
Circa 1940-1960 based on material type and design style
Dimensions
Estimated diameter of approximately 2 to 3 inches per cup, designed to fit standard furniture or piano wheel casters
Origin
Likely American or European manufacture dating from the mid-20th century
Designer/Maker
Unmarked generic manufacturer, commonly produced by various hardware and plastics companies in the mid-20th century
Value Estimate
Low market value, typically ranging from $10 to $25 for a small set, valued primarily for utility or vintage aesthetic appeal
Description
A set of three small, round, black synthetic caster cups featuring a distinct single small handle or knob on the rim. Designed primarily for placement beneath furniture or piano legs, these cups protect flooring surfaces from heavy point loads and prevent unwanted rolling. The glossy black finish and durable molded composition reflect mid-century utility hardware design.
Key Features
Round bowl shape, glossy black synthetic material, and a distinctive small spherical-tipped handle extending from the rim for easy positioning
Color & Finish
Glossy solid black finish with a smooth molded surface and subtle sheen typical of polished Bakelite
Construction Method
Mass-produced via industrial plastic molding techniques, specifically compression molding common in mid-century synthetic production
Joinery & Craftsmanship
Industrial molded construction with clean seams, no traditional woodworking joinery
Wood Grain & Species
Not applicable; made entirely of synthetic polymer material
Surface Treatment
Smooth molded finish with rounded knob handles characteristic of specialty anti-roll or positioning caster cups
Upholstery Details
Not applicable
Hardware & Fittings
Not applicable; these are hardware accessories themselves designed to receive furniture legs or casters
Origin & Provenance
Likely American or European manufacture dating from the mid-20th century
Condition Notes
Good vintage condition with minor surface scuffs consistent with age and light use; structurally sound with no cracks visible
Interesting Facts
Caster cups with handles are particularly associated with upright and grand pianos, allowing movers or owners to easily slide and position the cups under heavy caster wheels without putting fingers at risk
Cultural Significance
Represents the post-war boom in synthetic materials usage for everyday household hardware and floor protection accessories
Similar Pieces
Glass caster cups, wood caster cups, and heavy rubber floor protectors; distinguished primarily by the distinct handle and Bakelite-like material
Care & Maintenance
Clean with a soft, damp cloth and mild soap; avoid abrasive cleaners or harsh solvents that could dull the glossy finish
Value Estimate
Low market value, typically ranging from $10 to $25 for a small set, valued primarily for utility or vintage aesthetic appeal
Sustainability Notes
Represents durable vintage goods designed for long-term reuse and home preservation, avoiding disposable alternatives