DOUBTFUL - Guinea Bissau - 2011

Format: 2 Blocks
Title: Farois 

Thanks Jaap for the alert on this issue.

DOUBTFUL - St. Thomas & Prince - 2011

Format: Block
Title: Sea Birds and Lighthouses

Thanks Klaus for the information

DOUBTFUL - Guinea (Republic) 2011

Title: Fauna & Flora - Coquillages (Shells)
Format: Two Blocks...

 ... one of them with lighthouses as background.

DOUBTFUL - Congo (Democratic Republic) 2011

Title: Whales and Lighthouses

Format: Serie of 6 stamps.

 * Klaus Huelse noted a mistake in this issue. In the bottom left stamp, the lighthouse (Bunbury or Casuarina Point) is located in Australia, not South Africa.

OTHER FORMATS:

Individual Blocks

2 Blocks with 3 stamps each

 Thanks to Klaus for the alert on this issue.

DOUBTFUL - Guinea (Republic) 2011

Title: Fauna & Flora - Owls
Format: 2 blocks ...

... in one of them appear the Cape Columbine Lighthouse.

Thanks to Klaus for the info.

DOUBTFUL - Tchad 2011

9 more blocks. 18 in total counting the previously 9 published.

DOUBTFUL - Tchad 2011

A mix of whales, birds, shells, personalities, and lighthouses..., in a form of 9 blocks.