United 1st Series
| United Air Lines 1st Series All cards are airline issues.
| 1st Series 100 Columbia River - RPPC Seven lines of text on the front with the RPPC version.
| 1st Series 100 Columbia River - RPPC What we call Real Photo postcards this postcard maker printed on their cards "This is a Genuine Photograph."
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1st Series 100 Columbia River - Litho The litho version of the Columbia River postcard with just one line of text on the front.
| 1st Series 100 Columbia River - Litho The litho version of the card has a different back with the map in two circles logo.
| 1st Series 101 Mt. Shasta - RPPC In this case the Real Photo version of the postcard has the same text on the front as the Litho version.
| 1st Series 101 Mt. Shasta - RPPC Keeps the "This is a Genuine Photograph" version of the back.
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1st Series 101 Mt. Shasta - Litho The litho version has the same text on the front as the Real photo version.
| 1st Series 101 Mt. Shasta - Litho Keeps the litho back version with the map in two circles logo.
| 1st Series 102 Orange Groves - Litho This seems to be a little scarcer postcard. I do not have the Real Photo version if there is one.
| 1st Series 102 Orange Groves - Litho The card was mailed by a passenger in Chicago and has a clear postmark dated November 21, 1933.
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1st Series 110 Flying Across America - RPPC A unique type of card with multiple small scenes of cities they service or fly over.
| 1st Series 110 Flying Across America - RPPC Plain back except for the No. 110. I have not seen any cards numbered between 102 and 110.
| 1st Series No Number New York City - RPPC First of three versions of this card. Possibly the first card in the series issued by United. The postmark of June 23, 1932 is the earliest I've seen.
| 1st Series No Number New York City - RPPC This early version has Genuine Photograph made by the Process Photo Studios, Chicago, ILL printed on the card.
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1st Series 200 New York City - RPPC Usual numbered RPPC version of the postcard. Two lines of text on the front.
| 1st Series 200 New York City - RPPC Usual "This is a Real Photograph" back.
| 1st Series 200 New York City - Litho Litho version with 3 lines of text on the front.
| 1st Series 200 New York City - Litho This was mailed by a passenger and is postmarked November 23, 1933 at New York, N.Y.
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1st Series No Number Kansas City - Litho This early version has no number and no reference to United Airlines on the card.
| 1st Series No Number Kansas City - Litho Published by the Process Photo Studio, Chicago, Ill.
| 1st Series 201 Kansas City - Litho The numbered version with seven lines of text on the front.
| 1st Series 201 Kansas City - Litho Common back with the map in two circles logo.
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1st Series 202 Dallas - RPPC Real Photo version with five lines of text on the front.
| 1st Series 202 Dallas - RPPC Usual back with "This is a Genuine Photograph."
| 1st Series 203 Salt Lake City - RPPC Six lines of text on the front and the circled building labeled correctly.
| 1st Series 203 Salt Lake City - RPPC Unusal Real Photo back but without "This is a Genuine Photograph."
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1st Series 203 Salt Lake City - Litho Error variety. Nine lines of text on the front but the circled buildings are labeled incorrectly.
| 1st Series 203 Salt Lake City - Litho Mailed by a passenger at Cleveland, Ohio with a postmark of May 2, 1935.
| 1st Series 204 San Francisco - RPPC Real Photo version with four lines of text on the front.
| 1st Series 204 San Francisco - RPPC Mailed by a passenger using an 8-cent Airmail stamp and postmarked at Cheyenne, Wyo. March 15, 1933.
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1st Series 204 San Francisco - Litho Litho version with six lines of text on the front.
| 1st Series 204 San Francisco - Litho Clear postmark from San Francisco, Calif. dated March 13, 1934.
| 1st Series 205 Los Angeles - RPPC Real Photo version with five lines of text on the front.
| 1st Series 205 Los Angeles - RPPC Typical back with "This is a Genuine Photograph."
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1st Series 206 Cleveland - RPPC Real Photo version with six lines of text on the front.
| 1st Series 206 Cleveland - RPPC Usual back with "This is a Genuine Photograph" down the center.
| 1st Series 206 Cleveland - Litho Litho version with seven lines of text on the front.
| 1st Series 206 Cleveland - Litho Postmarked at Cleveland, Ohio dated March 1, 1934.
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