One of Britain's best-loved pen names, known for bright marbled and herringbone barrels. We place the pen in its era — original vintage or later revival — then assess the nib, the pattern, and how complete any set is.
Writing or not, with or without box and papers. Written valuation per pen. Free insured postage. Paid in 72 hours.
Conway Stewart was founded in London in 1905 and became one of Britain's most familiar pen makers, especially before the Second World War, celebrated for colourful casein and celluloid barrels. The original company later declined as the ballpoint took over and eventually closed. The brand name was subsequently revived by a separate business making new pens. Both matter to collectors, but they are not the same thing, and placing a pen in its era is the first step in valuing it.
The pens most collectors mean by "Conway Stewart" — twentieth-century British pens in patterned casein and celluloid, often lever-filled, with period imprints and model numbers such as the well-known 58.
Colour, pattern and original condition tend to drive interest here, alongside matching pen-and-pencil sets and any original box.
After the original firm closed, the name was revived by a different business producing new pens, generally more modern in style, materials and finish.
These are assessed on their own terms — model, materials, condition and completeness — rather than being treated as vintage. We will tell you honestly which era a pen belongs to.
Conway Stewart worked in several materials over its long history, and the material is a useful clue to a pen's age. You do not need to test anything — just tell us what you can see.
| Feature | What to look for |
|---|---|
| Casein | An early plastic made from milk protein, used for some bright patterned barrels. Sensitive to moisture and can warp or crack, so condition matters. |
| Celluloid | Vivid marbled, herringbone and cracked-ice patterns. Can shrink or discolour with age; the pattern's condition is part of the assessment. |
| Lever filler | A side lever operates an internal sac — typical of many vintage models. A hardened sac is common and often serviceable. |
| Model numbers | Numbers such as the 58 identify particular models and sizes. The barrel imprint and clip style help confirm the model. |
| Matching sets | Pen-and-pencil sets in the same pattern, ideally boxed, are recorded as a set where the pattern matches well. |
Once the era and model are established, condition drives the offer. We look at four areas and note each honestly on camera.
Gold grade and size, tine alignment, and whether the nib is original to the pen. Bent, sprung or re-tipped nibs are noted honestly.
Whether the lever and sac are present and function. A hardened sac or stiff lever is common with age and recorded rather than treated as damage.
Cracks, hairlines, discolouration and shrinkage in casein or celluloid, and how bright and even the pattern remains across the pen.
Original box, papers, matching pencil and correct clip and lever for the model. Personal engraving is recorded, as it can affect collector demand.
Fair Vintage is an independent vintage and collectables buyer and is not affiliated with, authorised by or endorsed by Conway Stewart or any current holder of the brand. Marks, imprints and model numbers can help with identification, but they can be worn or misleading; a physical inspection may be required before a final valuation or offer.
Clear photographs let us give a preliminary identification before anything is posted. Please send:
Photographs help with identification and condition, but they do not prove authenticity or era on their own; a physical inspection may still be needed. There is no need to dismantle the pen for a photograph.
Call us on 01234 815116 or email support@fairvintage.co.uk.
Get your free label →Conway Stewart was one of Britain's best-known pen makers for much of the twentieth century, and the vintage pens are valued for their patterned casein and celluloid barrels as much as for the model. Bright marbled and herringbone patterns, well-known model numbers such as the 58, matching pen-and-pencil sets and good original condition all add interest. Condition and pattern usually matter more than the name alone.
The original Conway Stewart company operated for much of the twentieth century before closing, and the brand name was later revived by a separate business making new pens. Vintage pens tend to show period materials such as casein and celluloid, older imprints and lever fillers, while later revival pens are generally newer in style and materials. The distinction can be subtle, so marks and imprints help but are not conclusive on their own; send photographs and we will place the pen in its period for you.
Yes, often. Conway Stewart is well known for its decorative casein and celluloid patterns, and some colourways and finishes are more sought after than others. Fading, discolouration and shrinkage of the material affect the assessment, as does any cracking. We look at the pattern, its condition and how well it matches across a pen-and-pencil set.
Yes. A vintage Conway Stewart with a hardened sac, a stiff lever or a dried feed is common and often serviceable, and is not without value. Cracks to the barrel or cap, damage to the pattern, missing levers or clips and replaced parts affect the assessment more. We record condition honestly and reflect it in the written offer rather than pricing every pen as mint.
No. Do not dismantle, polish aggressively or replace the sac on a vintage Conway Stewart before valuation, and do not have it restored first — original condition, including honest wear and patina, is what we assess. Casein and celluloid can be sensitive to moisture and heat, so a light dust with a soft dry cloth is enough. Send the pen as it is, with any box, papers or matching pencil you still have.
Era placed, model identified, pattern and nib assessed, condition noted on camera. Written offer per pen. Opened and documented. Paid within 72 hours.