Here we have a set of SIX Buttons as were worn on Best Dress Uniform for the Navy.

We take it that SIX would be a set.
"Quartermaster's Comment":-  The backs of these buttons have been quite softly struck......but the Maker reads as :-METAALWAKER*METAL*BADGE*PRETORIA......so we can see that they were made here in South Africa. These buttons as some 22 mm in diameter. They are all in very nice condition.