For the 4 islands in Manila Bay that used to be the Manila Bay Defense Forts, Corregidor-Ft. Mills, Caballo-Ft. Hughes, Fraile-Ft. Drum, Carabao-Ft.Frank.
Za626. Mason’s Keystone Lodge No. 100 plaque on Corregidor.
ZbCDSG089. Balloon Hangar-Ft. Mills Air Service on Corregidor, 1920s; photo from Karl Schmidt-CDSG.
ZbCDSG088. Balloon Store House-Ft. Mills Air Service on Corregidor, 1920s; photo from Karl Schmidt-CDSG.
ZbCDSG093. Balloon Hangar-Ft. Mills Air Service on Corregidor,1920s; photo from Karl Schmidt-CDSG.
ZbCDSG092. Balloon Hydrogen Plant-Ft. Mills Air Service on Corregidor,1920s; photo from Karl Schmidt-CDSG.
ZbCDSG091. Balloon-Ft. Mills Air Service on Corregidor,1920s; photo from Karl Schmidt-CDSG.
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ZbCDSG083. Construction-Ft. Mills Air Service on Corregidor, 1920s; photo from Karl Schmidt-CDSG.
ZbCDSG082. Salt Water Intake-Ft. Mills Air Service on Corregidor, 1920s; photo from Karl Schmidt-CDSG.
ZbCDSG087. Balloon Work Shop-Ft. Mills Air Service on Corregidor,1920s; photo from Karl Schmidt-CDSG.
ZbCDSG086. Balloon Hangar Construction-Ft. Mills Air Service on Corregidor,1920s; photo from Karl Schmidt-CDSG.