E365-France 1937 Saint-Claire Deville Aluminium 18F Stamp with Labels / Margins

Title 
France 1937 Saint-Claire Deville Aluminium 18F Stamp with Labels / Margins MNH
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Category
Stamps > Europe > France
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Condition
Mint Never Hinged (MNH)
Original gum intact on reverse
Attached advertising/illustrated labels (as issued)
No perforation faults noted
Light age toning visible on gum margins only (see photos)
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Item Specifics
Country/Region of Manufacture: France
Year of Issue: 1937
Topic: Science, Industry, Aluminium
Denomination: 18 Francs
Colour: Blue
Catalogue Reference: Yvert & Tellier No. 371
Quality: Mint Never Hinged (MNH)
Type: Postage Stamp with attached labels
Number of Stamps: 1 (with 2 attached labels)
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Description (optional but recommended)
Issued in 1937, this stamp commemorates Henri Étienne Sainte-Claire Deville (1818–1881), pioneer of aluminium metallurgy.
This example includes the original attached illustrated labels, which were printed alongside the stamp and are increasingly scarce intact.
A desirable item for collectors of French classics, science, or industrial themes.
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Valuation Information (Realistic Market)
Stamp alone (MNH, no labels): ~£8–£12
With attached labels (intact): ~£18–£30
Premium examples (very clean gum, sharp perforations): up to ~£35
Your example:
Labels intact ✔
Stamp front clean ✔
Minor gum toning on margins ❌ (small deduction)
Fair Market Value
£20–£25
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Recommended eBay Listing Price
Buy It Now (Best Option)
£24.99 Buy It Now
Enable “Best Offer”
Auto-accept: £20
Auto-decline: below £18
This captures collectors searching specifically for label pairs while allowing negotiation.
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Auction Option (If You Prefer)
Start Price: £14.99
Duration: 7 days
Reserve: Not recommended
Expected Realisation: £18–£26 depending on bidders