Florida Memory • William Henry Mattsen

Florida Memory is administered by the Florida Department of State, Division of Library and Information Services, Bureau of Archives and Records Management. The digitized records on Florida Memory come from the collections of the State Archives of Florida and the special collections of the State Library of Florida.

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William Henry Mattsen

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First Name

William

Last Name

Mattsen

Race

White

Rank

Seaman 2nd Class

Service

1420924

City of Residence

Clearwater

State of Residence

Florida

Branch

United States Navy

Box

Comment

No birth city or state

Title

William Henry Mattsen

Subject

World War (1914-1918)

Creator

Florida. Military Dept.

Source

State Archives of Florida, Series S1249

Format

military records

Type

Text

Identifier

s1249_b03_000827

Coverage

Florida Boom and Progressive Era (1900-1926)

Comment

No birth city or state

First Name

William

Last Name

Mattsen

Service Number

1420924

Rank

Seaman 2nd Class

Race/Ethnicity

White

City of Residence

Clearwater

State of Residence

Florida

PersonMilitaryBranch

United States Navy

Box

Identifier

s1249_b03_000827

Image URL

/FMP/wwi/cards/1249/03/039103-1249-03-DOC000827-P01.jpg

/FMP/wwi/cards/1249/03/039104-1249-03-DOC000827-P02.jpg

Thumbnail

/fpc/memory/omeka_images/thumbnails/wwi.jpg

Geographic Term

Clearwater (Fla.)

Pinellas County (Fla.)

Chicago Manual of Style

Florida. Military Dept. William Henry Mattsen. . State Archives of Florida, Florida Memory. <https://www.floridamemory.com/items/show/224788>, accessed 29 December 2025.

MLA

Florida. Military Dept. William Henry Mattsen. . State Archives of Florida, Florida Memory. Accessed 29 Dec. 2025.<https://www.floridamemory.com/items/show/224788>

AP Style Photo Citation

(State Archives of Florida/Florida. Military Dept.)

Florida Memory is a digital outreach program providing free online access to select archival records from collections housed in the State Library and Archives of Florida. Florida Memory digitizes materials that illuminate the state's history and culture.

Additional Links

Florida Memory is funded under the provisions of the Library Services and Technology Act from the Institute of Museum and Library Services. Florida's LSTA program is administered by the Department of State's Division of Library and Information Services.

For FY2025-26, the percentage of total costs for the Florida Memory program financed with federal money is 66%; the federal dollar amount to be spent on the program is $1,027,650. This program does not receive any non-governmental funding.

State Archives of Florida

State Library of Florida

Related Sites

Reconstruction era voting records

Florida's first automobile registrations

Milestones in Florida's political framework

Letters, ephemera and other historical records

Documenting Florida's chief executive officers

Description of previous item

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William Henry Mattsen

First Name

Last Name

Race

Rank

Service

City of Residence

State of Residence

Branch

Box

Comment

Title

Subject

Creator

Source

Format

Type

Identifier

Coverage

Comment

First Name

Last Name

Service Number

Rank

Race/Ethnicity

City of Residence

State of Residence

PersonMilitaryBranch

Box

Identifier

Image URL

Thumbnail

Geographic Term

Chicago Manual of Style

MLA

AP Style Photo Citation