50 Rand

The Stals-signed 50 Rand series is best known among collectors for the BP-prefix error notes, where the cotton substrate was fed into the press rotated 180 degrees — placing the security thread at the left rather than the right and inverting the watermark relative to the printed face. These were not caught before distribution, which means genuinely circulated error examples exist. The color variation between red-water and brown-water lion vignettes across the Stals signing period reflects successive ink specification changes at the South African Bank Note Company, not a deliberate reissue.