California Pacific Exposition
San Diego   1935-1936

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Postal Markings ~ Exposition Cancels

• SD35-01 A steel die hand-stamp with dater circle 30 mm in diameter with numeral "1" in the killer die space. Scarce-seldom seen.
  Earliest known use: 6/14/1935
  Latest known use: 11/11/1936 (Closing Day)

• SD36-01 Same as above except dated 1936. A steel die hand-stamp with dater circle 30 mm in diameter with numeral "1" in the killer die space. Much scarcer than 1935.
  Earliest known use ?
  Latest known use 9/3/1936

• SD35-02 A rubber hand-stamp 32 mm in diameter, reading "CALIF-PACIFIC INT. EXPOSITION STA." at the bottom with two types of killer lines noted below. This postal marking has been seen only on First Day Covers canceling blocks and plate blocks of the 3 cent Exposition commemorative stamp. Known only dated May 29, 1935. Not used in 1936.
  SD35-02A ~ killer 4 short lines - 23 mm in length
  SD35-02B ~ killer 4 long lines - 66 mm in length
  

• SD35-03 A unique type Universal machine with a double circle dial, with killer slogan between 7 lines reading "CALIFORNIA PACIFIC INTERNATIONAL EXPOSITION STATION". This machine used only to cancel First Day covers tying the 3 cent Exposition commemorative stamp, always with 9 AM. Used only on May 29, 1935. This type cancel dial was never used again.

• SD35-04 An International machine with a with 7 line killer slogan reading "CALIFORNIA PACIFIC INTERNATIONAL EXPOSITION STATION". This was the station cancel most commonly used on non-first day mail
  Earliest known use: 6/1/1935
  Latest known use: 11/11/1936 (Closing Day)

• SD36-04 Same as 35-04 except dated 1936. Five times as scarce as 1935 use.
  Earliest known use: 2/12/1936 (Opening Day)
  

• SD35-05 A double circle handstamp without killer, reading SAN DIEGO, CALIF. (CALIF. PAC. INT. EXP. STA) at the top. "REGISTERED" at the foot. Only date seen is Opening Day, May 29, 1935. A rare postal marking.

• SD35-05 Ship cancels

• SD35-11 A Universal machine cancel with slogan reading "CALIFORNIA PACIFIC INTERNATIONAL EXPOSITION". This is not a station cancel. Always seen with "2" at left of dial.
  Earliest known use: 3/15/1935
  Latest known use: 11/2/1935

Note: from Postal Markings of United States Expositions by William J. Bomar, published by David G. Phillips Publishing Co., Inc, 1986 (LOC 86-62510)

Here's a great display of CPIE Expo covers and ship cancels by Larry Gregg.