Conway Stewart

Duro / No. 388 or similar marbled set

Fountain Pen and Pencil Set

Conway Stewart Duro / No. 388 or similar marbled set

Filling System

Lever Filler

Condition

Very Good vintage condition with minor brassing

Estimated Value

$150 - $250

Era

Vintage 1930s-1950s

Pen Specifications

Pen Type

Fountain Pen and Pencil Set

Filling System

Lever Filler

Body Material

Casein / Celluloid

Trim Material

Gold-Plated

Color / Pattern

Green Marble / Pearl and Black

Cap Type

Screw Cap

Clip Design

Classic Conway Stewart spear/paddle clip with ball end

Barrel Shape

Cigar-Shaped Tapered

Nib Details

Nib Material

14K Gold

Nib Size

Medium

Nib Type

Semi-Flex

Nib Condition

Good condition with correct tipping and slight flexibility

Dimensions

Size / Dimensions

Approximately 130mm capped

Weight Estimate

Lightweight, approx 18g

Heritage & Origin

Era / Period

Vintage 1930s-1950s

Country of Origin

United Kingdom

Rarity

Uncommon

Condition & Value

Overall Condition

Very Good vintage condition with minor brassing

Filling System Condition

Needs new sac for full functionality

Estimated Value

$150 - $250

Special Features

Matching fountain pen and mechanical pencil set in vibrant green marble

Ink Recommendations

Standard washable blue or green fountain pen ink, avoid permanent iron gall

Care Recommendations

Do not submerge in water due to historical casein/celluloid material; clean gently with a damp cloth

Interesting Facts

Conway Stewart was one of Britain's premier pen manufacturers during the mid-20th century, often associated with British political history and Winston Churchill

Overall Assessment

A charming and highly collectible British vintage writing set featuring striking green marbled celluloid

Identified on September 29, 2026
Conway Stewart Duro / No. 388 or similar marbled set | Fountain Pen Identifier