the Great Britain 10-shilling King George V “Seahorse” stamp (SG 402)—a striking blue high-value definitve from the celebrated Seahorse series.
Overview & Background
- Issuing Year: Around 1915 (part of the Seahorse series issued between 1913–1919)
- Design & Printer: Features Britannia pulled by seahorses, designed by Bertram Mackennal, engraved by J.A.C. Harrison, printed by De La Rue.
Catalogue Value
- Stanley Gibbons quotes a value of approximately £4,000 for an unused (mint) example with original gum.
Summary Table
| Condition | Estimated Market Value |
|---|---|
| Mint, Unmounted (Original Gum) | ~£4,000 (retail) |
| Mounted Mint (special var.) | ~£3,000 catalog price |
| Used (good condition) | ~£100–£200 (actual retail) |
| Used (catalog indicated higher) | ~£900–£1,000 (catalog only) |
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