I have created one page for all philalelic items known about the same stamp for the country Portuguese Guinea.

There is half a sheet shown below (probably sheet of 200 stamps)

The FDCs identified are common to other Portuguese territories.

Cancellation date was 8 November 1958 in Macau (which was after the Exhibition is finished)

Only maximum card known with a cancellation in 1958 is depicted below. What is strange is that this is cancelled on 4 November 1958 which was before the first day of issue (see FDC)