The 1993 SkyBox American Vintage Cycles Series II 1932 Harley-Davidson Servi-Car Prototype Promo #152 trading card spotlights one of the most successful utility three-wheelers ever built. Adhering to the Series II promotional layout, the card is bordered by a distinct textured gray stone pattern and visually anchored by a golden winged "American Vintage Cycles" logo spanning across the lower edge. This highly collectible promo variant is designated by a prominent black oval stamp in the upper right corner reading "PROTOTYPE SKY BOX CARD".