The description of the SWIFT MT Message Block 1 (Basic Header) is provided in the table below. For the sake of clarity, following elements have been added: Start of block indicator, Block identifier, Separator and End of block indicator. There are in general not part of block descriptions in the available documentation. But I think it can be useful.  Back to SWIFT MT Message structure page with links to the other blocks.

Example of Basic header block
{1:F01BANKFRPPAABC4321123456}
{1:F 01 BANKFRPPAABC 4321 123456} with spaces between the fields

Back to SWIFT MT Message structure page with links to the other blocks.