Two technical drawings rendered in sepia tones depict railroad crossing mechanisms from a 1936 patent, with the left figure showing the iconic crossbuck sign and bell apparatus, and the right showing the articulated signal arm in raised position. The composition balances engineering precision with historical weight, rendered in fine linework against an aged paper ground that evokes the original patent document's weathered authenticity. Water-resistant polyester, hookless and cut extra long to fit any bath, machine washable and made to order. It turns the bathroom wall into the room's best feature.