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The United States Mint marked the nation's Semiquincentennial on July 4 with a special striking.
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To commemorate the centennial of America’s involvement in World War I and honor the over 4 million men and women from the United States who served. This set includes a proof silver dollar and a proof silver Air Service Medal.
Obverse Description
The obverse design depicts an iconic SPAD XIII, a World War I fighter flown by many Americans and valued for its speed, strength, and firepower, viewed from the top and side. The inscription “SPAD XIII” identifies the aircraft.
Reverse Description
The reverse designs depicts the Military Aviator Insignia. Inscriptions include “CENTENNIAL OF WORLD WAR I,” “2018,” “OVER THERE!,” “AIR SERVICE,” and “AMERICAN EXPEDITIONARY FORCES.”
Source: US Mint
Catalog Information
GSID:
375987
Fineness:
0.9
Weight (gr):
31.1 gr
Weight (oz):
1 oz
Precious Metal Weight:
26.73 oz
Strike Type:
Proof
Diameter:
38.1
Coin Shape:
Round
Edge:
Plain
Variety:
1oz Silver
Variety 2:
World War I Centennial, Air Service
Coin Date:
2018-D
Denomination:
Medal
Designation:
PR
Mint Location:
Denver
Mint Mark:
D
Coinage Type:
Medal
Coinage Years:
2018
Composition:
Silver
PCGS #:
659618
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Coin Value History
2018-D Medal 1oz Silver, World War I Centennial, Air Service PR DCAM
Value By Grade
2018-D Medal 1oz Silver, World War I Centennial, Air Service PR DCAM
CPG (retail) values
Currency
Grade Range
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Pricing
2018-P Medal 1oz Silver, World War I Centennial, Navy PR DCAM
Worth: $70 – $91
2018-P Medal 1oz Silver, World War I Centennial, Coast Guard PR DCAM
Worth: $70 – $91
2018-S Medal 1oz Silver, World War I Centennial, Marines PR DCAM
Worth: $70 – $91
2018-W Medal 1oz Silver, World War I Centennial, Army PR DCAM
Worth: $70 – $91
(2020) Medal 1oz Silver, 75th Anniversary World War II PR DCAM
Worth: $75 – $96
2020 Medal 1oz Silver, 400th Anniversary Mayflower Voyage PR DCAM
Worth: $131 – $156
2020 Medal 1oz Silver, 400th Anniversary Mayflower Voyage, Reverse Proof PR
Worth: $85 – $111
(2022) Medal Bronze, U.S. Air Force MS RD
Worth: $18 – $28
(2022) Medal 1oz Silver, U.S. Air Force, Matte Finish MS
Worth: $90 – $116
(2022) Medal 2.5oz Silver, U.S. Air Force, Matte Finish MS
Worth: $200 – $300
(2023) Medal Bronze, U.S. Coast Guard MS RD
Worth: $18 – $28
(2023) Medal 1oz Silver, U.S. Coast Guard, Matte Finish MS
Worth: $18 – $28
(2023) Medal 2.5oz Silver, U.S. Coast Guard, Matte Finish MS
Worth: $200 – $300
(2023) Medal Bronze, U.S. Marine Corps MS RD
Worth: $18 – $28
(2023) Medal 1oz Silver, U.S. Marine Corps, Matte Finish MS
Worth: $90 – $111
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Events
Heritage Auctions: US Coins Tuesday & Wednesday Select Auction
Location: Heritage Auctions
Wednesday, July 1, 2026
Heritage Auctions: World & Ancient Coins Wednesday & Thursday Select Auction
Location: Heritage Auctions
Thursday, July 2, 2026
