File:Perforations US1940 issues-2c.jpg

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Summary

Description	English: Sheet of US Postage stamps, 1940 issue, partial image, featuring perforations.
Date	29 January 1940
Source	Gwillhickers: Photo of sheet of stamps from private collection
Author	US Post Office

Licensing

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File usage

The following pages on Schools Wikipedia link to this image (list may be incomplete):

Postage stamp

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

Camera manufacturer	NIKON
Camera model	COOLPIX S550
Exposure time	10/243 sec (0.041152263374486)
F-number	f/3.5
ISO speed rating	400
Date and time of data generation	23:17, 13 September 2010
Lens focal length	6.3 mm
Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	COOLPIX S550V1.0
File change date and time	23:17, 13 September 2010
Y and C positioning	Co-sited
Exposure Program	Normal program
Exif version	2.2
Date and time of digitizing	23:17, 13 September 2010
Image compression mode	4
Exposure bias	0
Maximum land aperture	3.6 APEX (f/3.48)
Metering mode	Pattern
Light source	Tungsten (incandescent light)
Flash	Flash did not fire, compulsory flash suppression
Colour space	sRGB
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Manual white balance
Digital zoom ratio	0
Focal length in 35 mm film	36 mm
Scene capture type	Standard
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown

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