F678-USA 1973 Progress in Electronics 11c Airmail Block of 4 First Day Cover (FD

Title

USA 1973 Progress in Electronics 11c Airmail Block of 4 First Day Cover (FDC) New York

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Category

Stamps > United States > Covers > First Day Covers

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Condition

Used (First Day Cover with official cancellation).

Good condition – minor ageing, light marks, and slight envelope wear visible. Stamps and cancellation are clear.

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Item Specifics

Country/Region: United States

Year of Issue: 1973

Topic: Electronics / Technology

Denomination: 11c (Airmail)

Stamps: Block of 4

Cover Type: First Day Cover (FDC)

Cancellation: New York, First Day of Issue

Cachet: Progress in Electronics (De Forest Audion theme)

Colour: Multicolour

Condition Notes: Light toning and slight handling wear

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Price & Valuation

Estimated Market Value: £3 – £6

Block of 4 on FDC adds some appeal, but this is a fairly common 1970s US issue.

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Recommended

Sell as a Buy It Now with Best Offer to attract collectors, or bundle with similar FDCs for higher value.

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eBay Listing Price (£)

£5.99 (accept offers around £4)

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Auction Option

Start at £1.99

Expected final price: £3 – £5