There are two shapes of 50-siders (D50) that I know of,|
namely the spherical and di-pyramidal shapes.
A large 60 mm diameter white spherical D50, with numbers from 1 to 49 and the marking WMf.
An even larger red soft spherical D50.
On the right a 45 mm (top-top) di-pyramidal D50 with the numbers 0 to 49.