Unknown Vintage Maker
Tee Pen / T-Shape Stylus
Fountain Pen
Filling System
Eyedropper / Slip-in Cap T-Configuration
Condition
Fair, heavily oxidized ebonite with discoloration
Estimated Value
$150 - $300
Era
Early 1900s / WWI Era Trench Pen
Pen Specifications
Pen Type
Fountain Pen
Filling System
Eyedropper / Slip-in Cap T-Configuration
Body Material
Ebonite / Hard Rubber
Trim Material
None
Color / Pattern
Mottled / Discolored Black Hard Rubber
Cap Type
Slip Cap
Clip Design
Clipless
Barrel Shape
Straight Tapered with Knurled Knob
Nib Details
Nib Material
Steel
Nib Size
Fine
Nib Type
Standard
Nib Condition
Tarnished but functional
Dimensions
Size / Dimensions
Approx 80mm crossbar, 100mm total length
Weight Estimate
Lightweight, approx 15g
Heritage & Origin
Era / Period
Early 1900s / WWI Era Trench Pen
Country of Origin
Likely Europe or USA
Rarity
Rare
Condition & Value
Overall Condition
Fair, heavily oxidized ebonite with discoloration
Filling System Condition
Requires restoration of seals and sack or eyedropper cork
Estimated Value
$150 - $300
Special Features
T-shape configuration allows the cap to act as a crossbar for secure pocket or belt carry in military or industrial settings
Ink Recommendations
Standard vintage-safe fountain pen ink like Waterman Serenity Blue
Care Recommendations
Keep away from direct sunlight to prevent further ebonite discoloration, hand wash gently with lukewarm water
Interesting Facts
The 'T-pen' design was often utilized as a compact pocket-safe or trench pen where standard clips were impractical
Overall Assessment
A fascinating historical novelty fountain pen in T-configuration, highly collectible for historians of early writing instruments