'Sir Isaac Newton' (24-Mar-1987)
Type: First Day Cover
Issue Date: 24-Mar-1987
Postmark Type: Special Handstamp
Postmark Location: Apple's 10th Anniv. Hemel Hempstead
Address Type: Blank
Stamp 1: 18p The Principia Mathematica
Comments: Very scarce cover. No insert as issued.
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