Conway Stewart

Slimpen

Fountain Pen

Conway Stewart Slimpen

Filling System

Lever Filler

Condition

Fair to Good, showing visible wear, brassing, and some oxidation on the gold-filled surface

Estimated Value

$50 - $150 depending on full restoration and nib condition

Era

Vintage 1930s-1950s

Pen Specifications

Pen Type

Fountain Pen

Filling System

Lever Filler

Body Material

Casein / Plastic

Trim Material

Gold-Filled

Color / Pattern

Gold-Filled Wave Pattern / Herringbone

Cap Type

Slip Cap

Clip Design

Tapered clip with engraved brand name SLIMPEN vertically along the shaft

Barrel Shape

Cylindrical with tapered ends

Nib Details

Nib Material

14K Gold

Nib Size

Fine

Nib Type

Semi-Flex

Nib Condition

Appears intact, needs inspection for tine alignment

Dimensions

Size / Dimensions

Approximately 120mm capped

Weight Estimate

Lightweight, approx 15g

Heritage & Origin

Era / Period

Vintage 1930s-1950s

Country of Origin

United Kingdom

Rarity

Uncommon

Condition & Value

Overall Condition

Fair to Good, showing visible wear, brassing, and some oxidation on the gold-filled surface

Filling System Condition

Likely requires a new sac and lever mechanism restoration

Estimated Value

$50 - $150 depending on full restoration and nib condition

Special Features

Distinctive engraved clip spelling out SLIMPEN with ball-end rivets

Ink Recommendations

Standard washable dye-based inks, avoiding high-staining or iron gall inks due to vintage sac preservation

Care Recommendations

Store in a dry environment away from direct sunlight; avoid soaking casein bodies in water

Interesting Facts

Conway Stewart was a premier British pen manufacturer known for vibrant casein and chased metal overlays during the mid-20th century

Overall Assessment

A charming and collectible British vintage pen that requires restoration to return to fully functional writing condition

Identified on July 28, 2026