British India Revenue Stamp, Half Anna

This item is a postage and revenue stamp from British India, likely dating to the late 19th or early 20th century, given the 'REVENUE' inscription and the style. The stamp itself is square with a serrated outer border, printed on light cream-colored paper. The primary color of the design is a deep teal or dark green, although some discoloration is evident. The central motif features what appears to be a bust of a monarch or important figure, surrounded by a circular inscription that reads 'POSTAGE + REVENUE' along the top curve, and below it, within the circle, details that are heavily obscured but seem to include 'HALF ANNA'. The background of the central circular design is a lighter shade of green or teal. The outer border features a repeating zigzag or chevron pattern. A distinctive feature is the heavy, circular black cancellation mark overprinting the stamp. This cancellation mark reads 'MOMBASA' and appears to have a date 'NO 20' (presumably November 20th) and '90' (likely indicating a year such as 1890 or 1990, with the former being more probable given the stamp's style). The cancellation is quite heavy, obscuring significant portions of the central design and the value. The stamp shows signs of age, including some yellowing of the paper and minor wear along the edges. The perforations are visible on the top and bottom, suggesting it was torn from a sheet or booklet. The craftsmanship appears to be standard for postal stamps of the era, showcasing fine line work in the engraving.