Skip to content
Submit
Close search
US Stamps
expand
collapse
US Stamps
FDC's
US Carriers & Locals
US 19th Century
Classics 1-39
Civil War Period 63-101
1869 Pictorials 112-133
Large Banknotes 134-218
Small Banknotes 219-229
Columbians 230-245
US 1st Bureau Issues 246-284
Trans-Mississippi 285-293
Pan-American Expo 294-299
2nd Bureau Issues 300-320A
Liousiana Purchase 323-327
Jamestown Exposition 328-330
US 3rd Bureau Issues - Washington/Franklins 331//547
Lincoln Centenary of Birth 367-369
Alaska-Yukon-Pacific Expo 370-371
Hudson-Fulton Exposition 372-373
Panama-Pacific Exposition 397-404
Pilgrim Tercentenary 548-550
4th Bureau Issues 551//701
Kansas / Nebraska
20th Century - 1921 to 1937
1938 Presidential Series - Prexies 803-834/839-851
Famous Americans 859-893
Liberty Series 1030-1059A
Prominent Americans & Regular Issues 1209/1229,1278-1305C,1393-1402,1509-1520
Americana Series 1581-1625, 1811-1816
Great Americans I, II, III 1844-1869, 2168-2197, 2933-2943
Transportation Coil Issues 1897//2468
Flora & Fauna Series 2476-2495A, 3031-3055
American Design Series 3612, 3749-63
Distinguished Americans 3420-3436, 4510, 4666, 4879
American Music Series 2721//3345
US Coil Issues
US 20th Century Mint
US 20th Century Used
US 21st Century Used
Actors
American Revolution
EFO's
Founding Fathers
Mr. Zip Slogan
Politics/Politicians
Statehood
US American Folk Art
US American Treasures
US Black Heritage Series
US Legends of Hollywood
US Literary Arts
US LOVE Issues
US Performing Arts
US Presidents
US Commemorative Issues
US Setenant Blocks & Singles Sets
US Commemorative Year Sets
US Modern Definitives / Special Issues
US Sheets and Souvenir Sheets
US XF Stamps
US Back of Book
expand
collapse
US Back of Book
US Semi-Postals
US Airmail Issues
US Airmails - Used
US Special Delivery
US Registration & Certified Mail
US Postage Due
US Agency in China
US Official Mail
US Newspaper / Periosicals
US Postal Notes
US Parcel Post
US Parcel Post Postage Due
US Special Handling
US Booklets & Panes
US Complete Booklets
US Booklet Panes
US Booklet Panes - Never Folded
US Booklets and Panes - Self-Adhesive
US Booklet Singles & Setenants
US CVP - Computer Vended Postage
US Carriers & Locals
US Postal Stationery
US Revenue
US Ducks
Souvenir Cards - SC
Commemorative Panels (CP)
Savings Stamps (S, PS, WS)
Canal Zone
Philippines
Ryukyu Islands
US Plate Number Coils
expand
collapse
US Plate Number Coils
US Plate Number Coils - PS-1 / PS-2 / PS-3
US Plate Number Coils - PS-5 / PS-7
US Plate Number Coils - PS-9 / PS-11 / Larger
US Plate Number Coils - USED
US Plate Number Coils - w/Back Numbers
US Plate Blocks
expand
collapse
US Plate Blocks
US Plate Blocks - Up to 771
US Plate Blocks - 772 to 1053
US Plate Blocks - 1060 to 1295
US Plate Blocks - 1306 to 1622C
US Plate Blocks - 1631 to 2109
US Plate Blocks - 2110 to 2876
US Plate Blocks - 2877 to 3449
US Plate Blocks - 3467 to 4477
US Plate Blocks 4492 to Present
US Plate Blocks - BOB
NEWLY ADDED
SALE ITEMS
Pacific Islands
expand
collapse
Pacific Islands
Cook Islands
Aitutaki
Penrhyn
Kingdom of Tonga
Niuafou'ou
Samoa
Tokelau
Vanuatu
Countries A to Z
expand
collapse
Countries A to Z
Canada
Country Names A to E
Country Names F to J
Country Names K to O
Country Names P to S
Country Names T to Z
United Nations
expand
collapse
United Nations
UN-NY
UN-Geneva
UN-Vienna
Topicals
expand
collapse
Topicals
Agriculture
Animals - Domestic
Animals - Wild
Architecture
Art & Artists
Autos - Cars, Trucks & Buses
Aviation / Flight
Banking/Numismatics
Birds
Butterflies
Chinese New Year
Christmas / Easter / Religious
Disney Stamps
Education
Explorers
Fish & Marine Life
Flags & National Emblems
Flora - Flowers / Plants / Trees
Fruit / Food
Geography / Maps
Insects
Lawyers/Judiciary
Lighthouses
Medicine / Red Cross
Military / War
Motorcycles
Music / Dance
National Parks
Nature
Olympics
Reptiles / Amphibians
Royalty
Science, Technology & Inventions / Inventors
Scouting
Ships / Nautical
Space / Astronomy
Sports
Stamp Collecting / Stamps on Stamps
Trains / Rail
Transportation
Writers / Education
WWF - World Wildlife Fund
Postal History
Books, etc.
Shipping & Returns
About Us
Contact US
Blog Spot
US Stamps
expand
FDC's
US Carriers & Locals
US 19th Century
Classics 1-39
Civil War Period 63-101
1869 Pictorials 112-133
Large Banknotes 134-218
Small Banknotes 219-229
Columbians 230-245
US 1st Bureau Issues 246-284
Trans-Mississippi 285-293
Pan-American Expo 294-299
2nd Bureau Issues 300-320A
Liousiana Purchase 323-327
Jamestown Exposition 328-330
US 3rd Bureau Issues - Washington/Franklins 331//547
Lincoln Centenary of Birth 367-369
Alaska-Yukon-Pacific Expo 370-371
Hudson-Fulton Exposition 372-373
Panama-Pacific Exposition 397-404
Pilgrim Tercentenary 548-550
4th Bureau Issues 551//701
Kansas / Nebraska
20th Century - 1921 to 1937
1938 Presidential Series - Prexies 803-834/839-851
Famous Americans 859-893
Liberty Series 1030-1059A
Prominent Americans & Regular Issues 1209/1229,1278-1305C,1393-1402,1509-1520
Americana Series 1581-1625, 1811-1816
Great Americans I, II, III 1844-1869, 2168-2197, 2933-2943
Transportation Coil Issues 1897//2468
Flora & Fauna Series 2476-2495A, 3031-3055
American Design Series 3612, 3749-63
Distinguished Americans 3420-3436, 4510, 4666, 4879
American Music Series 2721//3345
US Coil Issues
US 20th Century Mint
US 20th Century Used
US 21st Century Used
Actors
American Revolution
EFO's
Founding Fathers
Mr. Zip Slogan
Politics/Politicians
Statehood
US American Folk Art
US American Treasures
US Black Heritage Series
US Legends of Hollywood
US Literary Arts
US LOVE Issues
US Performing Arts
US Presidents
US Commemorative Issues
US Setenant Blocks & Singles Sets
US Commemorative Year Sets
US Modern Definitives / Special Issues
US Sheets and Souvenir Sheets
US XF Stamps
US Back of Book
expand
US Semi-Postals
US Airmail Issues
US Airmails - Used
US Special Delivery
US Registration & Certified Mail
US Postage Due
US Agency in China
US Official Mail
US Newspaper / Periosicals
US Postal Notes
US Parcel Post
US Parcel Post Postage Due
US Special Handling
US Booklets & Panes
US Complete Booklets
US Booklet Panes
US Booklet Panes - Never Folded
US Booklets and Panes - Self-Adhesive
US Booklet Singles & Setenants
US CVP - Computer Vended Postage
US Carriers & Locals
US Postal Stationery
US Revenue
US Ducks
Souvenir Cards - SC
Commemorative Panels (CP)
Savings Stamps (S, PS, WS)
Canal Zone
Philippines
Ryukyu Islands
US Plate Number Coils
expand
US Plate Number Coils - PS-1 / PS-2 / PS-3
US Plate Number Coils - PS-5 / PS-7
US Plate Number Coils - PS-9 / PS-11 / Larger
US Plate Number Coils - USED
US Plate Number Coils - w/Back Numbers
US Plate Blocks
expand
US Plate Blocks - Up to 771
US Plate Blocks - 772 to 1053
US Plate Blocks - 1060 to 1295
US Plate Blocks - 1306 to 1622C
US Plate Blocks - 1631 to 2109
US Plate Blocks - 2110 to 2876
US Plate Blocks - 2877 to 3449
US Plate Blocks - 3467 to 4477
US Plate Blocks 4492 to Present
US Plate Blocks - BOB
NEWLY ADDED
SALE ITEMS
Pacific Islands
expand
Cook Islands
Aitutaki
Penrhyn
Kingdom of Tonga
Niuafou'ou
Samoa
Tokelau
Vanuatu
Countries A to Z
expand
Canada
Country Names A to E
Country Names F to J
Country Names K to O
Country Names P to S
Country Names T to Z
United Nations
expand
UN-NY
UN-Geneva
UN-Vienna
Topicals
expand
Agriculture
Animals - Domestic
Animals - Wild
Architecture
Art & Artists
Autos - Cars, Trucks & Buses
Aviation / Flight
Banking/Numismatics
Birds
Butterflies
Chinese New Year
Christmas / Easter / Religious
Disney Stamps
Education
Explorers
Fish & Marine Life
Flags & National Emblems
Flora - Flowers / Plants / Trees
Fruit / Food
Geography / Maps
Insects
Lawyers/Judiciary
Lighthouses
Medicine / Red Cross
Military / War
Motorcycles
Music / Dance
National Parks
Nature
Olympics
Reptiles / Amphibians
Royalty
Science, Technology & Inventions / Inventors
Scouting
Ships / Nautical
Space / Astronomy
Sports
Stamp Collecting / Stamps on Stamps
Trains / Rail
Transportation
Writers / Education
WWF - World Wildlife Fund
Postal History
Books, etc.
Shipping & Returns
About Us
Contact US
Blog Spot
Submit
Search
Log in
Cart
Cart
expand/collapse
# 1500 (1973) Marconi - Mr. Zip, BK/4, UL, MNH
Regular price
$0.35
Sale
Default Title
Add to cart
US 1973
MARCONI SPARK COIL
Electronics Progress Issue
The spark coil formed the heart of the earliest radio transmitters
.
Water Activated Gum
Scott 1500
Perforated 11
Upper Left Stamp Mr. Zip Block of 4
Mint Never Hinged
Share
Share on Facebook
Tweet
Tweet on Twitter
Pin it
Pin on Pinterest
Back to Science & Technology
