Year of issue - 1864
Perforation: 12.5
Catalog numbers: SG 50
SG Catalogue Values: 

SG50 - £70 (Unused) £10 (Used)
SG50bw (Wmk inverted) - £190 (Unused), £45 (Used)
SG50by (Wmk inverted & reversed) - £90 (Used)

Watermark: Star (W 1)
Printer: Perkins Bacon
Paper: Medium thin & slightly soft
Type: Recess

Image © Ceylon Stamps