Vintage engraved illustration of an antique brass canal lock key lifted by a magnet from rippling water. Text 'BRITISH WATERWAYS RELIC Est. 1770s'.

A detailed, intricate illustration for a T-shirt, executed in the style of a 19th-century engraved historical map or blueprint. The central motif is a highly corroded, but recognizable antique brass canal lock key being carefully lifted by a powerful, realistic fishing magnet (the magnet itself should be partially obscured by water ripples). Intricate cross-hatching for shading, no gradients. Above the key, curving in a distressed, elegant serif font, the text states: "BRITISH WATERWAYS RELIC". Below the key, smaller, straight text: "Est. 1770s". Use a monochrome palette of max 5 colors: deep black, aged brass ocher, sepia brown for corrosion, light grey for highlights, subtle dark teal for water. High contrast. Vertical composition. See more