A419-“Great Britain 1/- Penicillin (British Discoveries) 1967Mint Block of 4 N

Title:

“Great Britain 1/- Penicillin (British Discoveries) 1967 Mint Block of 4, NH + Additional Single”

Category:

Collectables → Stamps → Great Britain → Queen Elizabeth II Commemorative (1952-)

Condition:

Mint, never hinged (NH) block of 4 and an extra single in same condition. Original gum intact. Minor gum wrinkle/hinge mark if present to mention. Very fine overall.

Item Specifics:

Country/Region of Manufacture: United Kingdom

Year of Issue: 1967 (check year printed)

Face Value: 1 shilling (1/-)

Theme: British Discoveries / Medicine – Penicillin

Denomination: 1s

Mounting: Never Hinged / Mint NH

Format: Block of 4 + Single

Catalogue Number: SG 753 (or Scott 519) – used example listed at about £1.39.

Gum: Original full gum

Perf: Standard for issue

Colour: as per “Penicillin” commemorative design

Additional Notes: Feature “Harrison” imprint in lower margin (Harrison & Sons)

Price & Valuation:

Used examples of the 1s Penicillin stamp sell for around £1-2 in online listings.

For mint never hinged blocks, premium applies though I could not locate a confirmed recent sale for a block of 4 in perfect condition.

A rare variety (error on the 4 d “Lister Centenary” issue) is valued at ~£475 single example.

Based on condition (mint NH, block of 4 + single) a valuation might be conservatively around £25-£40 (UK sterling) depending on demand, gum condition, original margin, and desirability.

Recommended sale (Buy It Now) price: £35

Recommended auction starting bid: £10 (with no reserve) to attract bidders, potentially reaching £30-£40 if condition is strong.

Recommended Listing Format:

Buy It Now: £35

Or Auction Option: Start from £10, maybe with 7-10 day duration.

Include clear high-resolution photographs of front and back (showing gum, block, margins), mention any minor flaws (gum wrinkle, hinge mark) to manage buyer expectations.

---