Rhodesia SG199b 1 1/2d vertical pair Error Imperf Between M/M Cat 2500 pounds

1913/19 1 1/2d drab-brown perf 14 vertical pair error Imperf between mint large part o.g. trivial gum wrinkles mentioned for accuracy still very fine and rare. Holcombe opinion (1988) as SG 199a before vertical pairs were listed separately. SG 199b cat 2500 pounds