Tangent Warning: All kidding aside, this is built to established conventions of European horse-drawn hearses. Black wood bodywork, often elaborately carved to resemble cloth drapery, with carved wood ornaments on the roof were familiar features. Glass sides were typical though not ubiquitous. The horses drawing the carriage were often fitted with black tack and wore black feathered “hats”(?) styled after military helmets. I’m no expert on horses, so they’re probably not called hats.
If you built model cars in the 1960’s-70’s you may remember a George Barris creation, The Boot Hill Express. I snapped a picture of it with my Kodak 620 format camera using a tiny flashbulb. (Flashcubes were not yet invented.) The Barris show car was in The Museum of Modern Art exhibition “The Machine at the End of the Machine Age.” Based on a horse-drawn hearse of this style, had typical Model A ( or T?) transverse leaf suspension - but fully chromed. Also the typical huge drag slicks in the rear and a fuel injected 426 Hemi filling the compartment meant for the coffin. They also showed a Bugatti Royale, a Cisitalia, and a De Tomaso Vallelunga. The Boot Hill Express, the show at MOMA and all the cars mentioned are viewable online.